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<h2><span class="refentrytitle"><a name="GstPad.top_of_page"></a>GstPad</span></h2>
<p>GstPad — Object contained by elements that allows links to
                    other elements</p>
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<div class="refsect1">
<a name="GstPad.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-link-get-name" title="gst_pad_link_get_name ()">gst_pad_link_get_name</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-LINK-FAILED:CAPS" title="GST_PAD_LINK_FAILED()">GST_PAD_LINK_FAILED</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-LINK-SUCCESSFUL:CAPS" title="GST_PAD_LINK_SUCCESSFUL()">GST_PAD_LINK_SUCCESSFUL</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-flow-get-name" title="gst_flow_get_name ()">gst_flow_get_name</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Quarks.html#GQuark"><span class="returnvalue">GQuark</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-flow-to-quark" title="gst_flow_to_quark ()">gst_flow_to_quark</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-mode-get-name" title="gst_pad_mode_get_name ()">gst_pad_mode_get_name</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-store-sticky-event" title="gst_pad_store_sticky_event ()">gst_pad_store_sticky_event</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-get-name" title="gst_pad_get_name()">gst_pad_get_name</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstPad.html#GstPadDirection" title="enum GstPadDirection"><span class="returnvalue">GstPadDirection</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-get-direction" title="gst_pad_get_direction ()">gst_pad_get_direction</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-get-parent" title="gst_pad_get_parent()">gst_pad_get_parent</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstElement.html" title="GstElement"><span class="returnvalue">GstElement</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-get-parent-element" title="gst_pad_get_parent_element ()">gst_pad_get_parent_element</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstPadTemplate.html" title="GstPadTemplate"><span class="returnvalue">GstPadTemplate</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-get-pad-template" title="gst_pad_get_pad_template ()">gst_pad_get_pad_template</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstPad.html#GstPadLinkReturn" title="enum GstPadLinkReturn"><span class="returnvalue">GstPadLinkReturn</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-link" title="gst_pad_link ()">gst_pad_link</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstPad.html#GstPadLinkReturn" title="enum GstPadLinkReturn"><span class="returnvalue">GstPadLinkReturn</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-link-full" title="gst_pad_link_full ()">gst_pad_link_full</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-link-maybe-ghosting" title="gst_pad_link_maybe_ghosting ()">gst_pad_link_maybe_ghosting</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-link-maybe-ghosting-full" title="gst_pad_link_maybe_ghosting_full ()">gst_pad_link_maybe_ghosting_full</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-unlink" title="gst_pad_unlink ()">gst_pad_unlink</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-is-linked" title="gst_pad_is_linked ()">gst_pad_is_linked</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-can-link" title="gst_pad_can_link ()">gst_pad_can_link</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstCaps.html" title="GstCaps"><span class="returnvalue">GstCaps</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-get-allowed-caps" title="gst_pad_get_allowed_caps ()">gst_pad_get_allowed_caps</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstCaps.html" title="GstCaps"><span class="returnvalue">GstCaps</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-get-current-caps" title="gst_pad_get_current_caps ()">gst_pad_get_current_caps</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstCaps.html" title="GstCaps"><span class="returnvalue">GstCaps</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-get-pad-template-caps" title="gst_pad_get_pad_template_caps ()">gst_pad_get_pad_template_caps</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstPad.html" title="GstPad"><span class="returnvalue">GstPad</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-get-peer" title="gst_pad_get_peer ()">gst_pad_get_peer</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-use-fixed-caps" title="gst_pad_use_fixed_caps ()">gst_pad_use_fixed_caps</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-has-current-caps" title="gst_pad_has_current_caps ()">gst_pad_has_current_caps</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstEvent.html" title="GstEvent"><span class="returnvalue">GstEvent</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-get-sticky-event" title="gst_pad_get_sticky_event ()">gst_pad_get_sticky_event</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="GstPad.html#GstPadStickyEventsForeachFunction" title="GstPadStickyEventsForeachFunction ()">*GstPadStickyEventsForeachFunction</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-sticky-events-foreach" title="gst_pad_sticky_events_foreach ()">gst_pad_sticky_events_foreach</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-is-active" title="gst_pad_is_active ()">gst_pad_is_active</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-get-last-flow-return" title="gst_pad_get_last_flow_return ()">gst_pad_get_last_flow_return</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-PROBE-INFO-TYPE:CAPS" title="GST_PAD_PROBE_INFO_TYPE()">GST_PAD_PROBE_INFO_TYPE</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-PROBE-INFO-ID:CAPS" title="GST_PAD_PROBE_INFO_ID()">GST_PAD_PROBE_INFO_ID</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-PROBE-INFO-DATA:CAPS" title="GST_PAD_PROBE_INFO_DATA()">GST_PAD_PROBE_INFO_DATA</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-PROBE-INFO-BUFFER:CAPS" title="GST_PAD_PROBE_INFO_BUFFER()">GST_PAD_PROBE_INFO_BUFFER</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-PROBE-INFO-BUFFER-LIST:CAPS" title="GST_PAD_PROBE_INFO_BUFFER_LIST()">GST_PAD_PROBE_INFO_BUFFER_LIST</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-PROBE-INFO-EVENT:CAPS" title="GST_PAD_PROBE_INFO_EVENT()">GST_PAD_PROBE_INFO_EVENT</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-PROBE-INFO-QUERY:CAPS" title="GST_PAD_PROBE_INFO_QUERY()">GST_PAD_PROBE_INFO_QUERY</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstBuffer.html" title="GstBuffer"><span class="returnvalue">GstBuffer</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-probe-info-get-buffer" title="gst_pad_probe_info_get_buffer ()">gst_pad_probe_info_get_buffer</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstBufferList.html" title="GstBufferList"><span class="returnvalue">GstBufferList</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-probe-info-get-buffer-list" title="gst_pad_probe_info_get_buffer_list ()">gst_pad_probe_info_get_buffer_list</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstEvent.html" title="GstEvent"><span class="returnvalue">GstEvent</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-probe-info-get-event" title="gst_pad_probe_info_get_event ()">gst_pad_probe_info_get_event</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstQuery.html" title="GstQuery"><span class="returnvalue">GstQuery</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-probe-info-get-query" title="gst_pad_probe_info_get_query ()">gst_pad_probe_info_get_query</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-PROBE-INFO-OFFSET:CAPS" title="GST_PAD_PROBE_INFO_OFFSET()">GST_PAD_PROBE_INFO_OFFSET</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-PROBE-INFO-SIZE:CAPS" title="GST_PAD_PROBE_INFO_SIZE()">GST_PAD_PROBE_INFO_SIZE</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-PROBE-INFO-FLOW-RETURN:CAPS" title="GST_PAD_PROBE_INFO_FLOW_RETURN()">GST_PAD_PROBE_INFO_FLOW_RETURN</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstPad.html#GstPadProbeReturn" title="enum GstPadProbeReturn"><span class="returnvalue">GstPadProbeReturn</span></a>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="GstPad.html#GstPadProbeCallback" title="GstPadProbeCallback ()">*GstPadProbeCallback</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gulong"><span class="returnvalue">gulong</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-add-probe" title="gst_pad_add_probe ()">gst_pad_add_probe</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-remove-probe" title="gst_pad_remove_probe ()">gst_pad_remove_probe</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-is-blocked" title="gst_pad_is_blocked ()">gst_pad_is_blocked</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-is-blocking" title="gst_pad_is_blocking ()">gst_pad_is_blocking</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint64"><span class="returnvalue">gint64</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-get-offset" title="gst_pad_get_offset ()">gst_pad_get_offset</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-set-offset" title="gst_pad_set_offset ()">gst_pad_set_offset</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstPad.html" title="GstPad"><span class="returnvalue">GstPad</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-new" title="gst_pad_new ()">gst_pad_new</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstPad.html" title="GstPad"><span class="returnvalue">GstPad</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-new-from-template" title="gst_pad_new_from_template ()">gst_pad_new_from_template</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstPad.html" title="GstPad"><span class="returnvalue">GstPad</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-new-from-static-template" title="gst_pad_new_from_static_template ()">gst_pad_new_from_static_template</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-set-chain-function" title="gst_pad_set_chain_function()">gst_pad_set_chain_function</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-set-chain-function-full" title="gst_pad_set_chain_function_full ()">gst_pad_set_chain_function_full</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="GstPad.html#GstPadChainFunction" title="GstPadChainFunction ()">*GstPadChainFunction</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-set-chain-list-function" title="gst_pad_set_chain_list_function()">gst_pad_set_chain_list_function</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-set-chain-list-function-full" title="gst_pad_set_chain_list_function_full ()">gst_pad_set_chain_list_function_full</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="GstPad.html#GstPadChainListFunction" title="GstPadChainListFunction ()">*GstPadChainListFunction</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-get-range" title="gst_pad_get_range ()">gst_pad_get_range</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-set-getrange-function" title="gst_pad_set_getrange_function()">gst_pad_set_getrange_function</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-set-getrange-function-full" title="gst_pad_set_getrange_function_full ()">gst_pad_set_getrange_function_full</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="GstPad.html#GstPadGetRangeFunction" title="GstPadGetRangeFunction ()">*GstPadGetRangeFunction</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-set-event-function" title="gst_pad_set_event_function()">gst_pad_set_event_function</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-set-event-function-full" title="gst_pad_set_event_function_full ()">gst_pad_set_event_function_full</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="GstPad.html#GstPadEventFunction" title="GstPadEventFunction ()">*GstPadEventFunction</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-set-event-full-function" title="gst_pad_set_event_full_function()">gst_pad_set_event_full_function</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-set-event-full-function-full" title="gst_pad_set_event_full_function_full ()">gst_pad_set_event_full_function_full</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="GstPad.html#GstPadEventFullFunction" title="GstPadEventFullFunction ()">*GstPadEventFullFunction</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-set-link-function" title="gst_pad_set_link_function()">gst_pad_set_link_function</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-set-link-function-full" title="gst_pad_set_link_function_full ()">gst_pad_set_link_function_full</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstPad.html#GstPadLinkReturn" title="enum GstPadLinkReturn"><span class="returnvalue">GstPadLinkReturn</span></a>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="GstPad.html#GstPadLinkFunction" title="GstPadLinkFunction ()">*GstPadLinkFunction</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-set-unlink-function" title="gst_pad_set_unlink_function()">gst_pad_set_unlink_function</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-set-unlink-function-full" title="gst_pad_set_unlink_function_full ()">gst_pad_set_unlink_function_full</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="GstPad.html#GstPadUnlinkFunction" title="GstPadUnlinkFunction ()">*GstPadUnlinkFunction</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-proxy-query-caps" title="gst_pad_proxy_query_caps ()">gst_pad_proxy_query_caps</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-proxy-query-accept-caps" title="gst_pad_proxy_query_accept_caps ()">gst_pad_proxy_query_accept_caps</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-set-activate-function" title="gst_pad_set_activate_function()">gst_pad_set_activate_function</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-set-activate-function-full" title="gst_pad_set_activate_function_full ()">gst_pad_set_activate_function_full</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="GstPad.html#GstPadActivateFunction" title="GstPadActivateFunction ()">*GstPadActivateFunction</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-set-activatemode-function" title="gst_pad_set_activatemode_function()">gst_pad_set_activatemode_function</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-set-activatemode-function-full" title="gst_pad_set_activatemode_function_full ()">gst_pad_set_activatemode_function_full</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="GstPad.html#GstPadActivateModeFunction" title="GstPadActivateModeFunction ()">*GstPadActivateModeFunction</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-needs-reconfigure" title="gst_pad_needs_reconfigure ()">gst_pad_needs_reconfigure</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-check-reconfigure" title="gst_pad_check_reconfigure ()">gst_pad_check_reconfigure</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-mark-reconfigure" title="gst_pad_mark_reconfigure ()">gst_pad_mark_reconfigure</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-push" title="gst_pad_push ()">gst_pad_push</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-push-event" title="gst_pad_push_event ()">gst_pad_push_event</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-push-list" title="gst_pad_push_list ()">gst_pad_push_list</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-pull-range" title="gst_pad_pull_range ()">gst_pad_pull_range</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-activate-mode" title="gst_pad_activate_mode ()">gst_pad_activate_mode</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-send-event" title="gst_pad_send_event ()">gst_pad_send_event</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-event-default" title="gst_pad_event_default ()">gst_pad_event_default</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-query" title="gst_pad_query ()">gst_pad_query</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-peer-query" title="gst_pad_peer_query ()">gst_pad_peer_query</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-query-default" title="gst_pad_query_default ()">gst_pad_query_default</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-query-position" title="gst_pad_query_position ()">gst_pad_query_position</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-query-duration" title="gst_pad_query_duration ()">gst_pad_query_duration</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-query-convert" title="gst_pad_query_convert ()">gst_pad_query_convert</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-query-accept-caps" title="gst_pad_query_accept_caps ()">gst_pad_query_accept_caps</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstCaps.html" title="GstCaps"><span class="returnvalue">GstCaps</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-query-caps" title="gst_pad_query_caps ()">gst_pad_query_caps</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-peer-query-position" title="gst_pad_peer_query_position ()">gst_pad_peer_query_position</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-peer-query-duration" title="gst_pad_peer_query_duration ()">gst_pad_peer_query_duration</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-peer-query-convert" title="gst_pad_peer_query_convert ()">gst_pad_peer_query_convert</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-peer-query-accept-caps" title="gst_pad_peer_query_accept_caps ()">gst_pad_peer_query_accept_caps</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstCaps.html" title="GstCaps"><span class="returnvalue">GstCaps</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-peer-query-caps" title="gst_pad_peer_query_caps ()">gst_pad_peer_query_caps</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-set-query-function" title="gst_pad_set_query_function()">gst_pad_set_query_function</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-set-query-function-full" title="gst_pad_set_query_function_full ()">gst_pad_set_query_function_full</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="GstPad.html#GstPadQueryFunction" title="GstPadQueryFunction ()">*GstPadQueryFunction</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-set-iterate-internal-links-function" title="gst_pad_set_iterate_internal_links_function()">gst_pad_set_iterate_internal_links_function</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-set-iterate-internal-links-function-full" title="gst_pad_set_iterate_internal_links_function_full ()">gst_pad_set_iterate_internal_links_function_full</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="gstreamer-GstIterator.html#GstIterator" title="struct GstIterator"><span class="returnvalue">GstIterator</span></a> *
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="GstPad.html#GstPadIterIntLinkFunction" title="GstPadIterIntLinkFunction ()">*GstPadIterIntLinkFunction</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="gstreamer-GstIterator.html#GstIterator" title="struct GstIterator"><span class="returnvalue">GstIterator</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-iterate-internal-links" title="gst_pad_iterate_internal_links ()">gst_pad_iterate_internal_links</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="gstreamer-GstIterator.html#GstIterator" title="struct GstIterator"><span class="returnvalue">GstIterator</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-iterate-internal-links-default" title="gst_pad_iterate_internal_links_default ()">gst_pad_iterate_internal_links_default</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-set-element-private" title="gst_pad_set_element_private ()">gst_pad_set_element_private</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="returnvalue">gpointer</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-get-element-private" title="gst_pad_get_element_private ()">gst_pad_get_element_private</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-create-stream-id" title="gst_pad_create_stream_id ()">gst_pad_create_stream_id</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-create-stream-id-printf" title="gst_pad_create_stream_id_printf ()">gst_pad_create_stream_id_printf</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-create-stream-id-printf-valist" title="gst_pad_create_stream_id_printf_valist ()">gst_pad_create_stream_id_printf_valist</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-get-stream-id" title="gst_pad_get_stream_id ()">gst_pad_get_stream_id</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="gstreamer-GstStream.html#GstStream" title="struct GstStream"><span class="returnvalue">GstStream</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-get-stream" title="gst_pad_get_stream ()">gst_pad_get_stream</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="GstPad.html#GstPadForwardFunction" title="GstPadForwardFunction ()">*GstPadForwardFunction</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-forward" title="gst_pad_forward ()">gst_pad_forward</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-chain" title="gst_pad_chain ()">gst_pad_chain</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-chain-list" title="gst_pad_chain_list ()">gst_pad_chain_list</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-start-task" title="gst_pad_start_task ()">gst_pad_start_task</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-pause-task" title="gst_pad_pause_task ()">gst_pad_pause_task</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-stop-task" title="gst_pad_stop_task ()">gst_pad_stop_task</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstTask.html#GstTaskState" title="enum GstTaskState"><span class="returnvalue">GstTaskState</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-get-task-state" title="gst_pad_get_task_state ()">gst_pad_get_task_state</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstPad.html#gst-pad-set-active" title="gst_pad_set_active ()">gst_pad_set_active</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-GET-STREAM-LOCK:CAPS" title="GST_PAD_GET_STREAM_LOCK()">GST_PAD_GET_STREAM_LOCK</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-STREAM-LOCK:CAPS" title="GST_PAD_STREAM_LOCK()">GST_PAD_STREAM_LOCK</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-STREAM-TRYLOCK:CAPS" title="GST_PAD_STREAM_TRYLOCK()">GST_PAD_STREAM_TRYLOCK</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-STREAM-UNLOCK:CAPS" title="GST_PAD_STREAM_UNLOCK()">GST_PAD_STREAM_UNLOCK</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-NAME:CAPS" title="GST_PAD_NAME()">GST_PAD_NAME</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-PARENT:CAPS" title="GST_PAD_PARENT()">GST_PAD_PARENT</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-ELEMENT-PRIVATE:CAPS" title="GST_PAD_ELEMENT_PRIVATE()">GST_PAD_ELEMENT_PRIVATE</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-PAD-TEMPLATE:CAPS" title="GST_PAD_PAD_TEMPLATE()">GST_PAD_PAD_TEMPLATE</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-DIRECTION:CAPS" title="GST_PAD_DIRECTION()">GST_PAD_DIRECTION</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-LAST-FLOW-RETURN:CAPS" title="GST_PAD_LAST_FLOW_RETURN()">GST_PAD_LAST_FLOW_RETURN</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-TASK:CAPS" title="GST_PAD_TASK()">GST_PAD_TASK</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-MODE:CAPS" title="GST_PAD_MODE()">GST_PAD_MODE</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-ACTIVATEFUNC:CAPS" title="GST_PAD_ACTIVATEFUNC()">GST_PAD_ACTIVATEFUNC</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-ACTIVATEMODEFUNC:CAPS" title="GST_PAD_ACTIVATEMODEFUNC()">GST_PAD_ACTIVATEMODEFUNC</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-CHAINFUNC:CAPS" title="GST_PAD_CHAINFUNC()">GST_PAD_CHAINFUNC</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-CHAINLISTFUNC:CAPS" title="GST_PAD_CHAINLISTFUNC()">GST_PAD_CHAINLISTFUNC</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-EVENTFUNC:CAPS" title="GST_PAD_EVENTFUNC()">GST_PAD_EVENTFUNC</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-EVENTFULLFUNC:CAPS" title="GST_PAD_EVENTFULLFUNC()">GST_PAD_EVENTFULLFUNC</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-GETRANGEFUNC:CAPS" title="GST_PAD_GETRANGEFUNC()">GST_PAD_GETRANGEFUNC</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-QUERYFUNC:CAPS" title="GST_PAD_QUERYFUNC()">GST_PAD_QUERYFUNC</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-ITERINTLINKFUNC:CAPS" title="GST_PAD_ITERINTLINKFUNC()">GST_PAD_ITERINTLINKFUNC</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-PEER:CAPS" title="GST_PAD_PEER()">GST_PAD_PEER</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-LINKFUNC:CAPS" title="GST_PAD_LINKFUNC()">GST_PAD_LINKFUNC</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-UNLINKFUNC:CAPS" title="GST_PAD_UNLINKFUNC()">GST_PAD_UNLINKFUNC</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-IS-LINKED:CAPS" title="GST_PAD_IS_LINKED()">GST_PAD_IS_LINKED</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-IS-SRC:CAPS" title="GST_PAD_IS_SRC()">GST_PAD_IS_SRC</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-IS-SINK:CAPS" title="GST_PAD_IS_SINK()">GST_PAD_IS_SINK</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-IS-ACTIVE:CAPS" title="GST_PAD_IS_ACTIVE()">GST_PAD_IS_ACTIVE</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-IS-BLOCKED:CAPS" title="GST_PAD_IS_BLOCKED()">GST_PAD_IS_BLOCKED</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-IS-BLOCKING:CAPS" title="GST_PAD_IS_BLOCKING()">GST_PAD_IS_BLOCKING</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-IS-FLUSHING:CAPS" title="GST_PAD_IS_FLUSHING()">GST_PAD_IS_FLUSHING</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-SET-FLUSHING:CAPS" title="GST_PAD_SET_FLUSHING()">GST_PAD_SET_FLUSHING</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-UNSET-FLUSHING:CAPS" title="GST_PAD_UNSET_FLUSHING()">GST_PAD_UNSET_FLUSHING</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-IS-EOS:CAPS" title="GST_PAD_IS_EOS()">GST_PAD_IS_EOS</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-NEEDS-RECONFIGURE:CAPS" title="GST_PAD_NEEDS_RECONFIGURE()">GST_PAD_NEEDS_RECONFIGURE</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-HAS-PENDING-EVENTS:CAPS" title="GST_PAD_HAS_PENDING_EVENTS()">GST_PAD_HAS_PENDING_EVENTS</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-IS-FIXED-CAPS" title="GST_PAD_IS_FIXED_CAPS()">GST_PAD_IS_FIXED_CAPS</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-NEEDS-PARENT:CAPS" title="GST_PAD_NEEDS_PARENT()">GST_PAD_NEEDS_PARENT</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-IS-PROXY-CAPS" title="GST_PAD_IS_PROXY_CAPS()">GST_PAD_IS_PROXY_CAPS</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-SET-PROXY-CAPS" title="GST_PAD_SET_PROXY_CAPS()">GST_PAD_SET_PROXY_CAPS</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-UNSET-PROXY-CAPS" title="GST_PAD_UNSET_PROXY_CAPS()">GST_PAD_UNSET_PROXY_CAPS</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-IS-PROXY-ALLOCATION:CAPS" title="GST_PAD_IS_PROXY_ALLOCATION()">GST_PAD_IS_PROXY_ALLOCATION</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-SET-PROXY-ALLOCATION:CAPS" title="GST_PAD_SET_PROXY_ALLOCATION()">GST_PAD_SET_PROXY_ALLOCATION</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-UNSET-PROXY-ALLOCATION:CAPS" title="GST_PAD_UNSET_PROXY_ALLOCATION()">GST_PAD_UNSET_PROXY_ALLOCATION</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-SET-PROXY-SCHEDULING:CAPS" title="GST_PAD_SET_PROXY_SCHEDULING()">GST_PAD_SET_PROXY_SCHEDULING</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-UNSET-PROXY-SCHEDULING:CAPS" title="GST_PAD_UNSET_PROXY_SCHEDULING()">GST_PAD_UNSET_PROXY_SCHEDULING</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-IS-PROXY-SCHEDULING:CAPS" title="GST_PAD_IS_PROXY_SCHEDULING()">GST_PAD_IS_PROXY_SCHEDULING</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-IS-ACCEPT-INTERSECT:CAPS" title="GST_PAD_IS_ACCEPT_INTERSECT()">GST_PAD_IS_ACCEPT_INTERSECT</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-SET-ACCEPT-INTERSECT:CAPS" title="GST_PAD_SET_ACCEPT_INTERSECT()">GST_PAD_SET_ACCEPT_INTERSECT</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-UNSET-ACCEPT-INTERSECT:CAPS" title="GST_PAD_UNSET_ACCEPT_INTERSECT()">GST_PAD_UNSET_ACCEPT_INTERSECT</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-IS-ACCEPT-TEMPLATE:CAPS" title="GST_PAD_IS_ACCEPT_TEMPLATE()">GST_PAD_IS_ACCEPT_TEMPLATE</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-SET-ACCEPT-TEMPLATE:CAPS" title="GST_PAD_SET_ACCEPT_TEMPLATE()">GST_PAD_SET_ACCEPT_TEMPLATE</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstPad.html#GST-PAD-UNSET-ACCEPT-TEMPLATE:CAPS" title="GST_PAD_UNSET_ACCEPT_TEMPLATE()">GST_PAD_UNSET_ACCEPT_TEMPLATE</a><span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GstPad.properties"></a><h2>Properties</h2>
<div class="informaltable"><table class="informaltable" border="0">
<colgroup>
<col width="150px" class="properties_type">
<col width="300px" class="properties_name">
<col width="200px" class="properties_flags">
</colgroup>
<tbody>
<tr>
<td class="property_type">
<a class="link" href="GstCaps.html" title="GstCaps"><span class="type">GstCaps</span></a> *</td>
<td class="property_name"><a class="link" href="GstPad.html#GstPad--caps" title="The “caps” property">caps</a></td>
<td class="property_flags">Read</td>
</tr>
<tr>
<td class="property_type"><a class="link" href="GstPad.html#GstPadDirection" title="enum GstPadDirection"><span class="type">GstPadDirection</span></a></td>
<td class="property_name"><a class="link" href="GstPad.html#GstPad--direction" title="The “direction” property">direction</a></td>
<td class="property_flags">Read / Write / Construct Only</td>
</tr>
<tr>
<td class="property_type"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint64"><span class="type">gint64</span></a></td>
<td class="property_name"><a class="link" href="GstPad.html#GstPad--offset" title="The “offset” property">offset</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type">
<a class="link" href="GstPadTemplate.html" title="GstPadTemplate"><span class="type">GstPadTemplate</span></a> *</td>
<td class="property_name"><a class="link" href="GstPad.html#GstPad--template" title="The “template” property">template</a></td>
<td class="property_flags">Read / Write</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GstPad.signals"></a><h2>Signals</h2>
<div class="informaltable"><table class="informaltable" border="0">
<colgroup>
<col width="150px" class="signals_return">
<col width="300px" class="signals_name">
<col width="200px" class="signals_flags">
</colgroup>
<tbody>
<tr>
<td class="signal_type"><span class="returnvalue">void</span></td>
<td class="signal_name"><a class="link" href="GstPad.html#GstPad-linked" title="The “linked” signal">linked</a></td>
<td class="signal_flags"><a href="/usr/share/gtk-doc/html/gobject/gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS">Run Last</a></td>
</tr>
<tr>
<td class="signal_type"><span class="returnvalue">void</span></td>
<td class="signal_name"><a class="link" href="GstPad.html#GstPad-unlinked" title="The “unlinked” signal">unlinked</a></td>
<td class="signal_flags"><a href="/usr/share/gtk-doc/html/gobject/gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS">Run Last</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GstPad.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody>
<tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="GstPad.html#GstPad-struct" title="struct GstPad">GstPad</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="GstPad.html#GstPadDirection" title="enum GstPadDirection">GstPadDirection</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="GstPad.html#GstPadFlags" title="enum GstPadFlags">GstPadFlags</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="GstPad.html#GstPadLinkReturn" title="enum GstPadLinkReturn">GstPadLinkReturn</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="GstPad.html#GstPadLinkCheck" title="enum GstPadLinkCheck">GstPadLinkCheck</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn">GstFlowReturn</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="GstPad.html#GstPadMode" title="enum GstPadMode">GstPadMode</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="GstPad.html#GstPadProbeReturn" title="enum GstPadProbeReturn">GstPadProbeReturn</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="GstPad.html#GstPadProbeType" title="enum GstPadProbeType">GstPadProbeType</a></td>
</tr>
<tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="GstPad.html#GstPadProbeInfo" title="struct GstPadProbeInfo">GstPadProbeInfo</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GstPad.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen">    <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject-struct">GObject</a>
    <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GInitiallyUnowned">GInitiallyUnowned</a>
        <span class="lineart">╰──</span> <a class="link" href="GstObject.html" title="GstObject">GstObject</a>
            <span class="lineart">╰──</span> GstPad
                <span class="lineart">╰──</span> <a class="link" href="GstGhostPad.html#GstProxyPad">GstProxyPad</a>
</pre>
</div>
<div class="refsect1">
<a name="GstPad.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include &lt;gst/gst.h&gt;
</pre>
</div>
<div class="refsect1">
<a name="GstPad.description"></a><h2>Description</h2>
<p>A <a class="link" href="GstElement.html" title="GstElement"><span class="type">GstElement</span></a> is linked to other elements via "pads", which are extremely
light-weight generic link points.</p>
<p>Pads have a <a class="link" href="GstPad.html#GstPadDirection" title="enum GstPadDirection"><span class="type">GstPadDirection</span></a>, source pads produce data, sink pads consume
data.</p>
<p>Pads are typically created from a <a class="link" href="GstPadTemplate.html" title="GstPadTemplate"><span class="type">GstPadTemplate</span></a> with
<a class="link" href="GstPad.html#gst-pad-new-from-template" title="gst_pad_new_from_template ()"><code class="function">gst_pad_new_from_template()</code></a> and are then added to a <a class="link" href="GstElement.html" title="GstElement"><span class="type">GstElement</span></a>. This usually
happens when the element is created but it can also happen dynamically based
on the data that the element is processing or based on the pads that the
application requests.</p>
<p>Pads without pad templates can be created with <a class="link" href="GstPad.html#gst-pad-new" title="gst_pad_new ()"><code class="function">gst_pad_new()</code></a>,
which takes a direction and a name as an argument.  If the name is <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>,
then a guaranteed unique name will be assigned to it.</p>
<p>A <a class="link" href="GstElement.html" title="GstElement"><span class="type">GstElement</span></a> creating a pad will typically use the various
gst_pad_set_*_function() calls to register callbacks for events, queries or
dataflow on the pads.</p>
<p>gst_pad_get_parent() will retrieve the <a class="link" href="GstElement.html" title="GstElement"><span class="type">GstElement</span></a> that owns the pad.</p>
<p>After two pads are retrieved from an element by <a class="link" href="GstElement.html#gst-element-get-static-pad" title="gst_element_get_static_pad ()"><code class="function">gst_element_get_static_pad()</code></a>,
the pads can be linked with <a class="link" href="GstPad.html#gst-pad-link" title="gst_pad_link ()"><code class="function">gst_pad_link()</code></a>. (For quick links,
you can also use <a class="link" href="GstElement.html#gst-element-link" title="gst_element_link ()"><code class="function">gst_element_link()</code></a>, which will make the obvious
link for you if it's straightforward.). Pads can be unlinked again with
<a class="link" href="GstPad.html#gst-pad-unlink" title="gst_pad_unlink ()"><code class="function">gst_pad_unlink()</code></a>. <a class="link" href="GstPad.html#gst-pad-get-peer" title="gst_pad_get_peer ()"><code class="function">gst_pad_get_peer()</code></a> can be used to check what the pad is
linked to.</p>
<p>Before dataflow is possible on the pads, they need to be activated with
<a class="link" href="GstPad.html#gst-pad-set-active" title="gst_pad_set_active ()"><code class="function">gst_pad_set_active()</code></a>.</p>
<p>gst_pad_query() and <a class="link" href="GstPad.html#gst-pad-peer-query" title="gst_pad_peer_query ()"><code class="function">gst_pad_peer_query()</code></a> can be used to query various
properties of the pad and the stream.</p>
<p>To send a <a class="link" href="GstEvent.html" title="GstEvent"><span class="type">GstEvent</span></a> on a pad, use <a class="link" href="GstPad.html#gst-pad-send-event" title="gst_pad_send_event ()"><code class="function">gst_pad_send_event()</code></a> and
<a class="link" href="GstPad.html#gst-pad-push-event" title="gst_pad_push_event ()"><code class="function">gst_pad_push_event()</code></a>. Some events will be sticky on the pad, meaning that
after they pass on the pad they can be queried later with
<a class="link" href="GstPad.html#gst-pad-get-sticky-event" title="gst_pad_get_sticky_event ()"><code class="function">gst_pad_get_sticky_event()</code></a> and <a class="link" href="GstPad.html#gst-pad-sticky-events-foreach" title="gst_pad_sticky_events_foreach ()"><code class="function">gst_pad_sticky_events_foreach()</code></a>.
<a class="link" href="GstPad.html#gst-pad-get-current-caps" title="gst_pad_get_current_caps ()"><code class="function">gst_pad_get_current_caps()</code></a> and <a class="link" href="GstPad.html#gst-pad-has-current-caps" title="gst_pad_has_current_caps ()"><code class="function">gst_pad_has_current_caps()</code></a> are convenience
functions to query the current sticky CAPS event on a pad.</p>
<p>GstElements will use <a class="link" href="GstPad.html#gst-pad-push" title="gst_pad_push ()"><code class="function">gst_pad_push()</code></a> and <a class="link" href="GstPad.html#gst-pad-pull-range" title="gst_pad_pull_range ()"><code class="function">gst_pad_pull_range()</code></a> to push out
or pull in a buffer.</p>
<p>The dataflow, events and queries that happen on a pad can be monitored with
probes that can be installed with <a class="link" href="GstPad.html#gst-pad-add-probe" title="gst_pad_add_probe ()"><code class="function">gst_pad_add_probe()</code></a>. <a class="link" href="GstPad.html#gst-pad-is-blocked" title="gst_pad_is_blocked ()"><code class="function">gst_pad_is_blocked()</code></a>
can be used to check if a block probe is installed on the pad.
<a class="link" href="GstPad.html#gst-pad-is-blocking" title="gst_pad_is_blocking ()"><code class="function">gst_pad_is_blocking()</code></a> checks if the blocking probe is currently blocking the
pad. <a class="link" href="GstPad.html#gst-pad-remove-probe" title="gst_pad_remove_probe ()"><code class="function">gst_pad_remove_probe()</code></a> is used to remove a previously installed probe
and unblock blocking probes if any.</p>
<p>Pad have an offset that can be retrieved with <a class="link" href="GstPad.html#gst-pad-get-offset" title="gst_pad_get_offset ()"><code class="function">gst_pad_get_offset()</code></a>. This
offset will be applied to the running_time of all data passing over the pad.
<a class="link" href="GstPad.html#gst-pad-set-offset" title="gst_pad_set_offset ()"><code class="function">gst_pad_set_offset()</code></a> can be used to change the offset.</p>
<p>Convenience functions exist to start, pause and stop the task on a pad with
<a class="link" href="GstPad.html#gst-pad-start-task" title="gst_pad_start_task ()"><code class="function">gst_pad_start_task()</code></a>, <a class="link" href="GstPad.html#gst-pad-pause-task" title="gst_pad_pause_task ()"><code class="function">gst_pad_pause_task()</code></a> and <a class="link" href="GstPad.html#gst-pad-stop-task" title="gst_pad_stop_task ()"><code class="function">gst_pad_stop_task()</code></a>
respectively.</p>
</div>
<div class="refsect1">
<a name="GstPad.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="gst-pad-link-get-name"></a><h3>gst_pad_link_get_name ()</h3>
<pre class="programlisting">const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
gst_pad_link_get_name (<em class="parameter"><code><a class="link" href="GstPad.html#GstPadLinkReturn" title="enum GstPadLinkReturn"><span class="type">GstPadLinkReturn</span></a> ret</code></em>);</pre>
<p>Gets a string representing the given pad-link return.</p>
<div class="refsect3">
<a name="gst-pad-link-get-name.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>ret</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html#GstPadLinkReturn" title="enum GstPadLinkReturn"><span class="type">GstPadLinkReturn</span></a> to get the name of.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-link-get-name.returns"></a><h4>Returns</h4>
<p> a static string with the name of the pad-link return.</p>
</div>
<p class="since">Since: <a class="link" href="ix08.html#api-index-1.4">1.4</a></p>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-LINK-FAILED:CAPS"></a><h3>GST_PAD_LINK_FAILED()</h3>
<pre class="programlisting">#define GST_PAD_LINK_FAILED(ret) ((ret) &lt; GST_PAD_LINK_OK)
</pre>
<p>Macro to test if the given <a class="link" href="GstPad.html#GstPadLinkReturn" title="enum GstPadLinkReturn"><span class="type">GstPadLinkReturn</span></a> value indicates a failed
link step.</p>
<div class="refsect3">
<a name="GST-PAD-LINK-FAILED.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>ret</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html#GstPadLinkReturn" title="enum GstPadLinkReturn"><span class="type">GstPadLinkReturn</span></a> value</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-LINK-SUCCESSFUL:CAPS"></a><h3>GST_PAD_LINK_SUCCESSFUL()</h3>
<pre class="programlisting">#define GST_PAD_LINK_SUCCESSFUL(ret) ((ret) &gt;= GST_PAD_LINK_OK)
</pre>
<p>Macro to test if the given <a class="link" href="GstPad.html#GstPadLinkReturn" title="enum GstPadLinkReturn"><span class="type">GstPadLinkReturn</span></a> value indicates a successful
link step.</p>
<div class="refsect3">
<a name="GST-PAD-LINK-SUCCESSFUL.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>ret</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html#GstPadLinkReturn" title="enum GstPadLinkReturn"><span class="type">GstPadLinkReturn</span></a> value</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-flow-get-name"></a><h3>gst_flow_get_name ()</h3>
<pre class="programlisting">const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
gst_flow_get_name (<em class="parameter"><code><a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="type">GstFlowReturn</span></a> ret</code></em>);</pre>
<p>Gets a string representing the given flow return.</p>
<div class="refsect3">
<a name="gst-flow-get-name.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>ret</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="type">GstFlowReturn</span></a> to get the name of.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-flow-get-name.returns"></a><h4>Returns</h4>
<p> a static string with the name of the flow return.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-flow-to-quark"></a><h3>gst_flow_to_quark ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Quarks.html#GQuark"><span class="returnvalue">GQuark</span></a>
gst_flow_to_quark (<em class="parameter"><code><a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="type">GstFlowReturn</span></a> ret</code></em>);</pre>
<p>Get the unique quark for the given GstFlowReturn.</p>
<div class="refsect3">
<a name="gst-flow-to-quark.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>ret</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="type">GstFlowReturn</span></a> to get the quark of.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-flow-to-quark.returns"></a><h4>Returns</h4>
<p> the quark associated with the flow return or 0 if an
invalid return was specified.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-mode-get-name"></a><h3>gst_pad_mode_get_name ()</h3>
<pre class="programlisting">const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
gst_pad_mode_get_name (<em class="parameter"><code><a class="link" href="GstPad.html#GstPadMode" title="enum GstPadMode"><span class="type">GstPadMode</span></a> mode</code></em>);</pre>
<p>Return the name of a pad mode, for use in debug messages mostly.</p>
<div class="refsect3">
<a name="gst-pad-mode-get-name.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>mode</p></td>
<td class="parameter_description"><p>the pad mode</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-mode-get-name.returns"></a><h4>Returns</h4>
<p> short mnemonic for pad mode <em class="parameter"><code>mode</code></em>
</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-store-sticky-event"></a><h3>gst_pad_store_sticky_event ()</h3>
<pre class="programlisting"><a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a>
gst_pad_store_sticky_event (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                            <em class="parameter"><code><a class="link" href="GstEvent.html" title="GstEvent"><span class="type">GstEvent</span></a> *event</code></em>);</pre>
<p>Store the sticky <em class="parameter"><code>event</code></em>
 on <em class="parameter"><code>pad</code></em>
</p>
<div class="refsect3">
<a name="gst-pad-store-sticky-event.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>event</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstEvent.html" title="GstEvent"><span class="type">GstEvent</span></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-store-sticky-event.returns"></a><h4>Returns</h4>
<p> <a class="link" href="GstPad.html#GST-FLOW-OK:CAPS"><span class="type">GST_FLOW_OK</span></a> on success, <a class="link" href="GstPad.html#GST-FLOW-FLUSHING:CAPS"><span class="type">GST_FLOW_FLUSHING</span></a> when the pad
was flushing or <a class="link" href="GstPad.html#GST-FLOW-EOS:CAPS"><span class="type">GST_FLOW_EOS</span></a> when the pad was EOS.</p>
</div>
<p class="since">Since: <a class="link" href="ix10.html#api-index-1.2">1.2</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-get-name"></a><h3>gst_pad_get_name()</h3>
<pre class="programlisting">#define gst_pad_get_name(pad) gst_object_get_name (GST_OBJECT_CAST (pad))
</pre>
<p>Get a copy of the name of the pad. <a href="/usr/share/gtk-doc/html/glib/glib-Memory-Allocation.html#g-free"><code class="function">g_free()</code></a> after usage.</p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-pad-get-name.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the pad to get the name from</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-get-direction"></a><h3>gst_pad_get_direction ()</h3>
<pre class="programlisting"><a class="link" href="GstPad.html#GstPadDirection" title="enum GstPadDirection"><span class="returnvalue">GstPadDirection</span></a>
gst_pad_get_direction (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>);</pre>
<p>Gets the direction of the pad. The direction of the pad is
decided at construction time so this function does not take
the LOCK.</p>
<div class="refsect3">
<a name="gst-pad-get-direction.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to get the direction of.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-get-direction.returns"></a><h4>Returns</h4>
<p> the <a class="link" href="GstPad.html#GstPadDirection" title="enum GstPadDirection"><span class="type">GstPadDirection</span></a> of the pad.</p>
<p>MT safe.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-get-parent"></a><h3>gst_pad_get_parent()</h3>
<pre class="programlisting">#define gst_pad_get_parent(pad) gst_object_get_parent (GST_OBJECT_CAST (pad))
</pre>
<p>Get the parent of <em class="parameter"><code>pad</code></em>
. This function increases the refcount
of the parent object so you should <a class="link" href="GstObject.html#gst-object-unref" title="gst_object_unref ()"><code class="function">gst_object_unref()</code></a> it after usage.
Can return <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if the pad did not have a parent.</p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-pad-get-parent.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the pad to get the parent of</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-get-parent.returns"></a><h4>Returns</h4>
<p>the parent. </p>
<p><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-get-parent-element"></a><h3>gst_pad_get_parent_element ()</h3>
<pre class="programlisting"><a class="link" href="GstElement.html" title="GstElement"><span class="returnvalue">GstElement</span></a> *
gst_pad_get_parent_element (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>);</pre>
<p>Gets the parent of <em class="parameter"><code>pad</code></em>
, cast to a <a class="link" href="GstElement.html" title="GstElement"><span class="type">GstElement</span></a>. If a <em class="parameter"><code>pad</code></em>
 has no parent or
its parent is not an element, return <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.</p>
<div class="refsect3">
<a name="gst-pad-get-parent-element.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a pad</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-get-parent-element.returns"></a><h4>Returns</h4>
<p>the parent of the pad. The
caller has a reference on the parent, so unref when you're finished
with it.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-get-pad-template"></a><h3>gst_pad_get_pad_template ()</h3>
<pre class="programlisting"><a class="link" href="GstPadTemplate.html" title="GstPadTemplate"><span class="returnvalue">GstPadTemplate</span></a> *
gst_pad_get_pad_template (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>);</pre>
<p>Gets the template for <em class="parameter"><code>pad</code></em>
.</p>
<div class="refsect3">
<a name="gst-pad-get-pad-template.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-get-pad-template.returns"></a><h4>Returns</h4>
<p>the <a class="link" href="GstPadTemplate.html" title="GstPadTemplate"><span class="type">GstPadTemplate</span></a> from which
this pad was instantiated, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if this pad has no
template. Unref after usage. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-link"></a><h3>gst_pad_link ()</h3>
<pre class="programlisting"><a class="link" href="GstPad.html#GstPadLinkReturn" title="enum GstPadLinkReturn"><span class="returnvalue">GstPadLinkReturn</span></a>
gst_pad_link (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *srcpad</code></em>,
              <em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *sinkpad</code></em>);</pre>
<p>Links the source pad and the sink pad.</p>
<div class="refsect3">
<a name="gst-pad-link.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>srcpad</p></td>
<td class="parameter_description"><p>the source <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to link.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>sinkpad</p></td>
<td class="parameter_description"><p>the sink <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to link.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-link.returns"></a><h4>Returns</h4>
<p> A result code indicating if the connection worked or
what went wrong.</p>
<p>MT Safe.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-link-full"></a><h3>gst_pad_link_full ()</h3>
<pre class="programlisting"><a class="link" href="GstPad.html#GstPadLinkReturn" title="enum GstPadLinkReturn"><span class="returnvalue">GstPadLinkReturn</span></a>
gst_pad_link_full (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *srcpad</code></em>,
                   <em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *sinkpad</code></em>,
                   <em class="parameter"><code><a class="link" href="GstPad.html#GstPadLinkCheck" title="enum GstPadLinkCheck"><span class="type">GstPadLinkCheck</span></a> flags</code></em>);</pre>
<p>Links the source pad and the sink pad.</p>
<p>This variant of <a class="link" href="GstPad.html#gst-pad-link" title="gst_pad_link ()"><span class="type">gst_pad_link</span></a> provides a more granular control on the
checks being done when linking. While providing some considerable speedups
the caller of this method must be aware that wrong usage of those flags
can cause severe issues. Refer to the documentation of <a class="link" href="GstPad.html#GstPadLinkCheck" title="enum GstPadLinkCheck"><span class="type">GstPadLinkCheck</span></a>
for more information.</p>
<p>MT Safe.</p>
<div class="refsect3">
<a name="gst-pad-link-full.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>srcpad</p></td>
<td class="parameter_description"><p>the source <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to link.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>sinkpad</p></td>
<td class="parameter_description"><p>the sink <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to link.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>flags</p></td>
<td class="parameter_description"><p>the checks to validate when linking</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-link-full.returns"></a><h4>Returns</h4>
<p> A result code indicating if the connection worked or
what went wrong.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-link-maybe-ghosting"></a><h3>gst_pad_link_maybe_ghosting ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_link_maybe_ghosting (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *src</code></em>,
                             <em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *sink</code></em>);</pre>
<p>Links <em class="parameter"><code>src</code></em>
 to <em class="parameter"><code>sink</code></em>
, creating any <a class="link" href="GstGhostPad.html" title="GstGhostPad"><span class="type">GstGhostPad</span></a>'s in between as necessary.</p>
<p>This is a convenience function to save having to create and add intermediate
<a class="link" href="GstGhostPad.html" title="GstGhostPad"><span class="type">GstGhostPad</span></a>'s as required for linking across <a class="link" href="GstBin.html" title="GstBin"><span class="type">GstBin</span></a> boundaries.</p>
<p>If <em class="parameter"><code>src</code></em>
 or <em class="parameter"><code>sink</code></em>
 pads don't have parent elements or do not share a common
ancestor, the link will fail.</p>
<div class="refsect3">
<a name="gst-pad-link-maybe-ghosting.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>sink</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-link-maybe-ghosting.returns"></a><h4>Returns</h4>
<p> whether the link succeeded.</p>
</div>
<p class="since">Since: <a class="link" href="ix05.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-link-maybe-ghosting-full"></a><h3>gst_pad_link_maybe_ghosting_full ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_link_maybe_ghosting_full (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *src</code></em>,
                                  <em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *sink</code></em>,
                                  <em class="parameter"><code><a class="link" href="GstPad.html#GstPadLinkCheck" title="enum GstPadLinkCheck"><span class="type">GstPadLinkCheck</span></a> flags</code></em>);</pre>
<p>Links <em class="parameter"><code>src</code></em>
 to <em class="parameter"><code>sink</code></em>
, creating any <a class="link" href="GstGhostPad.html" title="GstGhostPad"><span class="type">GstGhostPad</span></a>'s in between as necessary.</p>
<p>This is a convenience function to save having to create and add intermediate
<a class="link" href="GstGhostPad.html" title="GstGhostPad"><span class="type">GstGhostPad</span></a>'s as required for linking across <a class="link" href="GstBin.html" title="GstBin"><span class="type">GstBin</span></a> boundaries.</p>
<p>If <em class="parameter"><code>src</code></em>
 or <em class="parameter"><code>sink</code></em>
 pads don't have parent elements or do not share a common
ancestor, the link will fail.</p>
<p>Calling <a class="link" href="GstPad.html#gst-pad-link-maybe-ghosting-full" title="gst_pad_link_maybe_ghosting_full ()"><code class="function">gst_pad_link_maybe_ghosting_full()</code></a> with
<em class="parameter"><code>flags</code></em>
 == <a class="link" href="GstPad.html#GST-PAD-LINK-CHECK-DEFAULT:CAPS"><code class="literal">GST_PAD_LINK_CHECK_DEFAULT</code></a> is the recommended way of linking
pads with safety checks applied.</p>
<div class="refsect3">
<a name="gst-pad-link-maybe-ghosting-full.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>sink</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>flags</p></td>
<td class="parameter_description"><p>some <a class="link" href="GstPad.html#GstPadLinkCheck" title="enum GstPadLinkCheck"><span class="type">GstPadLinkCheck</span></a> flags</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-link-maybe-ghosting-full.returns"></a><h4>Returns</h4>
<p> whether the link succeeded.</p>
</div>
<p class="since">Since: <a class="link" href="ix05.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-unlink"></a><h3>gst_pad_unlink ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_unlink (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *srcpad</code></em>,
                <em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *sinkpad</code></em>);</pre>
<p>Unlinks the source pad from the sink pad. Will emit the <a class="link" href="GstPad.html#GstPad-unlinked" title="The “unlinked” signal"><span class="type">“unlinked”</span></a>
signal on both pads.</p>
<div class="refsect3">
<a name="gst-pad-unlink.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>srcpad</p></td>
<td class="parameter_description"><p>the source <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to unlink.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>sinkpad</p></td>
<td class="parameter_description"><p>the sink <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to unlink.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-unlink.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the pads were unlinked. This function returns <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> if
the pads were not linked together.</p>
<p>MT safe.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-is-linked"></a><h3>gst_pad_is_linked ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_is_linked (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>);</pre>
<p>Checks if a <em class="parameter"><code>pad</code></em>
 is linked to another pad or not.</p>
<div class="refsect3">
<a name="gst-pad-is-linked.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>pad to check</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-is-linked.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the pad is linked, <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> otherwise.</p>
<p>MT safe.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-can-link"></a><h3>gst_pad_can_link ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_can_link (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *srcpad</code></em>,
                  <em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *sinkpad</code></em>);</pre>
<p>Checks if the source pad and the sink pad are compatible so they can be
linked.</p>
<div class="refsect3">
<a name="gst-pad-can-link.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>srcpad</p></td>
<td class="parameter_description"><p>the source <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>sinkpad</p></td>
<td class="parameter_description"><p>the sink <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-can-link.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the pads can be linked.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-get-allowed-caps"></a><h3>gst_pad_get_allowed_caps ()</h3>
<pre class="programlisting"><a class="link" href="GstCaps.html" title="GstCaps"><span class="returnvalue">GstCaps</span></a> *
gst_pad_get_allowed_caps (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>);</pre>
<p>Gets the capabilities of the allowed media types that can flow through
<em class="parameter"><code>pad</code></em>
 and its peer.</p>
<p>The allowed capabilities is calculated as the intersection of the results of
calling <a class="link" href="GstPad.html#gst-pad-query-caps" title="gst_pad_query_caps ()"><code class="function">gst_pad_query_caps()</code></a> on <em class="parameter"><code>pad</code></em>
 and its peer. The caller owns a reference
on the resulting caps.</p>
<div class="refsect3">
<a name="gst-pad-get-allowed-caps.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-get-allowed-caps.returns"></a><h4>Returns</h4>
<p>the allowed <a class="link" href="GstCaps.html" title="GstCaps"><span class="type">GstCaps</span></a> of the
pad link. Unref the caps when you no longer need it. This
function returns <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> when <em class="parameter"><code>pad</code></em>
has no peer.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-get-current-caps"></a><h3>gst_pad_get_current_caps ()</h3>
<pre class="programlisting"><a class="link" href="GstCaps.html" title="GstCaps"><span class="returnvalue">GstCaps</span></a> *
gst_pad_get_current_caps (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>);</pre>
<p>Gets the capabilities currently configured on <em class="parameter"><code>pad</code></em>
 with the last
<a class="link" href="GstEvent.html#GST-EVENT-CAPS"><span class="type">GST_EVENT_CAPS</span></a> event.</p>
<div class="refsect3">
<a name="gst-pad-get-current-caps.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a  <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to get the current capabilities of.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-get-current-caps.returns"></a><h4>Returns</h4>
<p>the current caps of the pad with
incremented ref-count or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> when pad has no caps. Unref after usage. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-get-pad-template-caps"></a><h3>gst_pad_get_pad_template_caps ()</h3>
<pre class="programlisting"><a class="link" href="GstCaps.html" title="GstCaps"><span class="returnvalue">GstCaps</span></a> *
gst_pad_get_pad_template_caps (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>);</pre>
<p>Gets the capabilities for <em class="parameter"><code>pad</code></em>
's template.</p>
<div class="refsect3">
<a name="gst-pad-get-pad-template-caps.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to get the template capabilities from.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-get-pad-template-caps.returns"></a><h4>Returns</h4>
<p>the <a class="link" href="GstCaps.html" title="GstCaps"><span class="type">GstCaps</span></a> of this pad template.
Unref after usage. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-get-peer"></a><h3>gst_pad_get_peer ()</h3>
<pre class="programlisting"><a class="link" href="GstPad.html" title="GstPad"><span class="returnvalue">GstPad</span></a> *
gst_pad_get_peer (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>);</pre>
<p>Gets the peer of <em class="parameter"><code>pad</code></em>
. This function refs the peer pad so
you need to unref it after use.</p>
<div class="refsect3">
<a name="gst-pad-get-peer.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to get the peer of.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-get-peer.returns"></a><h4>Returns</h4>
<p>the peer <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>. Unref after usage.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-use-fixed-caps"></a><h3>gst_pad_use_fixed_caps ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_pad_use_fixed_caps (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>);</pre>
<p>A helper function you can use that sets the FIXED_CAPS flag
This way the default CAPS query will always return the negotiated caps
or in case the pad is not negotiated, the padtemplate caps.</p>
<p>The negotiated caps are the caps of the last CAPS event that passed on the
pad. Use this function on a pad that, once it negotiated to a CAPS, cannot
be renegotiated to something else.</p>
<div class="refsect3">
<a name="gst-pad-use-fixed-caps.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the pad to use</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-has-current-caps"></a><h3>gst_pad_has_current_caps ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_has_current_caps (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>);</pre>
<p>Check if <em class="parameter"><code>pad</code></em>
 has caps set on it with a <a class="link" href="GstEvent.html#GST-EVENT-CAPS"><span class="type">GST_EVENT_CAPS</span></a> event.</p>
<div class="refsect3">
<a name="gst-pad-has-current-caps.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a  <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to check</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-has-current-caps.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> when <em class="parameter"><code>pad</code></em>
has caps associated with it.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-get-sticky-event"></a><h3>gst_pad_get_sticky_event ()</h3>
<pre class="programlisting"><a class="link" href="GstEvent.html" title="GstEvent"><span class="returnvalue">GstEvent</span></a> *
gst_pad_get_sticky_event (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                          <em class="parameter"><code><a class="link" href="GstEvent.html#GstEventType" title="enum GstEventType"><span class="type">GstEventType</span></a> event_type</code></em>,
                          <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> idx</code></em>);</pre>
<p>Returns a new reference of the sticky event of type <em class="parameter"><code>event_type</code></em>

from the event.</p>
<div class="refsect3">
<a name="gst-pad-get-sticky-event.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to get the event from.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>event_type</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstEvent.html#GstEventType" title="enum GstEventType"><span class="type">GstEventType</span></a> that should be retrieved.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>idx</p></td>
<td class="parameter_description"><p>the index of the event</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-get-sticky-event.returns"></a><h4>Returns</h4>
<p>a <a class="link" href="GstEvent.html" title="GstEvent"><span class="type">GstEvent</span></a> of type
<em class="parameter"><code>event_type</code></em>
or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> when no event of <em class="parameter"><code>event_type</code></em>
was on
<em class="parameter"><code>pad</code></em>
. Unref after usage. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GstPadStickyEventsForeachFunction"></a><h3>GstPadStickyEventsForeachFunction ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
<span class="c_punctuation">(</span>*GstPadStickyEventsForeachFunction<span class="c_punctuation">)</span> (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                                      <em class="parameter"><code><a class="link" href="GstEvent.html" title="GstEvent"><span class="type">GstEvent</span></a> **event</code></em>,
                                      <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre>
<p>Callback used by <a class="link" href="GstPad.html#gst-pad-sticky-events-foreach" title="gst_pad_sticky_events_foreach ()"><code class="function">gst_pad_sticky_events_foreach()</code></a>.</p>
<p>When this function returns <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a>, the next event will be
returned. When <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> is returned, <a class="link" href="GstPad.html#gst-pad-sticky-events-foreach" title="gst_pad_sticky_events_foreach ()"><code class="function">gst_pad_sticky_events_foreach()</code></a> will return.</p>
<p>When <em class="parameter"><code>event</code></em>
 is set to <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>, the item will be removed from the list of sticky events.
<em class="parameter"><code>event</code></em>
 can be replaced by assigning a new reference to it.
This function is responsible for unreffing the old event when
removing or modifying.</p>
<div class="refsect3">
<a name="GstPadStickyEventsForeachFunction.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>event</p></td>
<td class="parameter_description"><p>a sticky <a class="link" href="GstEvent.html" title="GstEvent"><span class="type">GstEvent</span></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>the <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> to optional user data.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="GstPadStickyEventsForeachFunction.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the iteration should continue</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-sticky-events-foreach"></a><h3>gst_pad_sticky_events_foreach ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_pad_sticky_events_foreach (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                               <em class="parameter"><code><a class="link" href="GstPad.html#GstPadStickyEventsForeachFunction" title="GstPadStickyEventsForeachFunction ()"><span class="type">GstPadStickyEventsForeachFunction</span></a> foreach_func</code></em>,
                               <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre>
<p>Iterates all sticky events on <em class="parameter"><code>pad</code></em>
 and calls <em class="parameter"><code>foreach_func</code></em>
 for every
event. If <em class="parameter"><code>foreach_func</code></em>
 returns <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> the iteration is immediately stopped.</p>
<div class="refsect3">
<a name="gst-pad-sticky-events-foreach.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> that should be used for iteration.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>foreach_func</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html#GstPadStickyEventsForeachFunction" title="GstPadStickyEventsForeachFunction ()"><span class="type">GstPadStickyEventsForeachFunction</span></a> that
should be called for every event. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="The callback is valid only during the call to the method."><span class="acronym">scope call</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>the optional user data. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="This parameter is a 'user_data', for callbacks; many bindings can pass NULL here."><span class="acronym">closure</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-is-active"></a><h3>gst_pad_is_active ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_is_active (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>);</pre>
<p>Query if a pad is active</p>
<div class="refsect3">
<a name="gst-pad-is-active.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to query</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-is-active.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the pad is active.</p>
<p>MT safe.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-get-last-flow-return"></a><h3>gst_pad_get_last_flow_return ()</h3>
<pre class="programlisting"><a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a>
gst_pad_get_last_flow_return (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>);</pre>
<p>Gets the <a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="type">GstFlowReturn</span></a> return from the last data passed by this pad.</p>
<div class="refsect3">
<a name="gst-pad-get-last-flow-return.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix08.html#api-index-1.4">1.4</a></p>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-PROBE-INFO-TYPE:CAPS"></a><h3>GST_PAD_PROBE_INFO_TYPE()</h3>
<pre class="programlisting">#define GST_PAD_PROBE_INFO_TYPE(d)         ((d)-&gt;type)
</pre>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-PROBE-INFO-ID:CAPS"></a><h3>GST_PAD_PROBE_INFO_ID()</h3>
<pre class="programlisting">#define GST_PAD_PROBE_INFO_ID(d)           ((d)-&gt;id)
</pre>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-PROBE-INFO-DATA:CAPS"></a><h3>GST_PAD_PROBE_INFO_DATA()</h3>
<pre class="programlisting">#define GST_PAD_PROBE_INFO_DATA(d)         ((d)-&gt;data)
</pre>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-PROBE-INFO-BUFFER:CAPS"></a><h3>GST_PAD_PROBE_INFO_BUFFER()</h3>
<pre class="programlisting">#define GST_PAD_PROBE_INFO_BUFFER(d)       GST_BUFFER_CAST(GST_PAD_PROBE_INFO_DATA(d))
</pre>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-PROBE-INFO-BUFFER-LIST:CAPS"></a><h3>GST_PAD_PROBE_INFO_BUFFER_LIST()</h3>
<pre class="programlisting">#define GST_PAD_PROBE_INFO_BUFFER_LIST(d)  GST_BUFFER_LIST_CAST(GST_PAD_PROBE_INFO_DATA(d))
</pre>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-PROBE-INFO-EVENT:CAPS"></a><h3>GST_PAD_PROBE_INFO_EVENT()</h3>
<pre class="programlisting">#define GST_PAD_PROBE_INFO_EVENT(d)        GST_EVENT_CAST(GST_PAD_PROBE_INFO_DATA(d))
</pre>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-PROBE-INFO-QUERY:CAPS"></a><h3>GST_PAD_PROBE_INFO_QUERY()</h3>
<pre class="programlisting">#define GST_PAD_PROBE_INFO_QUERY(d)        GST_QUERY_CAST(GST_PAD_PROBE_INFO_DATA(d))
</pre>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-probe-info-get-buffer"></a><h3>gst_pad_probe_info_get_buffer ()</h3>
<pre class="programlisting"><a class="link" href="GstBuffer.html" title="GstBuffer"><span class="returnvalue">GstBuffer</span></a> *
gst_pad_probe_info_get_buffer (<em class="parameter"><code><a class="link" href="GstPad.html#GstPadProbeInfo" title="struct GstPadProbeInfo"><span class="type">GstPadProbeInfo</span></a> *info</code></em>);</pre>
<div class="refsect3">
<a name="gst-pad-probe-info-get-buffer.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>info</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html#GstPadProbeInfo" title="struct GstPadProbeInfo"><span class="type">GstPadProbeInfo</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-probe-info-get-buffer.returns"></a><h4>Returns</h4>
<p>The <a class="link" href="GstBuffer.html" title="GstBuffer"><span class="type">GstBuffer</span></a> from the probe. </p>
<p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-probe-info-get-buffer-list"></a><h3>gst_pad_probe_info_get_buffer_list ()</h3>
<pre class="programlisting"><a class="link" href="GstBufferList.html" title="GstBufferList"><span class="returnvalue">GstBufferList</span></a> *
gst_pad_probe_info_get_buffer_list (<em class="parameter"><code><a class="link" href="GstPad.html#GstPadProbeInfo" title="struct GstPadProbeInfo"><span class="type">GstPadProbeInfo</span></a> *info</code></em>);</pre>
<div class="refsect3">
<a name="gst-pad-probe-info-get-buffer-list.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>info</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html#GstPadProbeInfo" title="struct GstPadProbeInfo"><span class="type">GstPadProbeInfo</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-probe-info-get-buffer-list.returns"></a><h4>Returns</h4>
<p>The <a class="link" href="GstBufferList.html" title="GstBufferList"><span class="type">GstBufferList</span></a> from the probe. </p>
<p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-probe-info-get-event"></a><h3>gst_pad_probe_info_get_event ()</h3>
<pre class="programlisting"><a class="link" href="GstEvent.html" title="GstEvent"><span class="returnvalue">GstEvent</span></a> *
gst_pad_probe_info_get_event (<em class="parameter"><code><a class="link" href="GstPad.html#GstPadProbeInfo" title="struct GstPadProbeInfo"><span class="type">GstPadProbeInfo</span></a> *info</code></em>);</pre>
<div class="refsect3">
<a name="gst-pad-probe-info-get-event.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>info</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html#GstPadProbeInfo" title="struct GstPadProbeInfo"><span class="type">GstPadProbeInfo</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-probe-info-get-event.returns"></a><h4>Returns</h4>
<p>The <a class="link" href="GstEvent.html" title="GstEvent"><span class="type">GstEvent</span></a> from the probe. </p>
<p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-probe-info-get-query"></a><h3>gst_pad_probe_info_get_query ()</h3>
<pre class="programlisting"><a class="link" href="GstQuery.html" title="GstQuery"><span class="returnvalue">GstQuery</span></a> *
gst_pad_probe_info_get_query (<em class="parameter"><code><a class="link" href="GstPad.html#GstPadProbeInfo" title="struct GstPadProbeInfo"><span class="type">GstPadProbeInfo</span></a> *info</code></em>);</pre>
<div class="refsect3">
<a name="gst-pad-probe-info-get-query.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>info</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html#GstPadProbeInfo" title="struct GstPadProbeInfo"><span class="type">GstPadProbeInfo</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-probe-info-get-query.returns"></a><h4>Returns</h4>
<p>The <a class="link" href="GstQuery.html" title="GstQuery"><span class="type">GstQuery</span></a> from the probe. </p>
<p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-PROBE-INFO-OFFSET:CAPS"></a><h3>GST_PAD_PROBE_INFO_OFFSET()</h3>
<pre class="programlisting">#define GST_PAD_PROBE_INFO_OFFSET(d)       ((d)-&gt;offset)
</pre>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-PROBE-INFO-SIZE:CAPS"></a><h3>GST_PAD_PROBE_INFO_SIZE()</h3>
<pre class="programlisting">#define GST_PAD_PROBE_INFO_SIZE(d)         ((d)-&gt;size)
</pre>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-PROBE-INFO-FLOW-RETURN:CAPS"></a><h3>GST_PAD_PROBE_INFO_FLOW_RETURN()</h3>
<pre class="programlisting">#define GST_PAD_PROBE_INFO_FLOW_RETURN(d)  ((d)-&gt;ABI.abi.flow_ret)
</pre>
</div>
<hr>
<div class="refsect2">
<a name="GstPadProbeCallback"></a><h3>GstPadProbeCallback ()</h3>
<pre class="programlisting"><a class="link" href="GstPad.html#GstPadProbeReturn" title="enum GstPadProbeReturn"><span class="returnvalue">GstPadProbeReturn</span></a>
<span class="c_punctuation">(</span>*GstPadProbeCallback<span class="c_punctuation">)</span> (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                        <em class="parameter"><code><a class="link" href="GstPad.html#GstPadProbeInfo" title="struct GstPadProbeInfo"><span class="type">GstPadProbeInfo</span></a> *info</code></em>,
                        <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre>
<p>Callback used by <a class="link" href="GstPad.html#gst-pad-add-probe" title="gst_pad_add_probe ()"><code class="function">gst_pad_add_probe()</code></a>. Gets called to notify about the current
blocking type.</p>
<p>The callback is allowed to modify the data pointer in <em class="parameter"><code>info</code></em>
.</p>
<div class="refsect3">
<a name="GstPadProbeCallback.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> that is blocked</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>info</p></td>
<td class="parameter_description"><p><a class="link" href="GstPad.html#GstPadProbeInfo" title="struct GstPadProbeInfo"><span class="type">GstPadProbeInfo</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>the gpointer to optional user data.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="GstPadProbeCallback.returns"></a><h4>Returns</h4>
<p> a <a class="link" href="GstPad.html#GstPadProbeReturn" title="enum GstPadProbeReturn"><span class="type">GstPadProbeReturn</span></a></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-add-probe"></a><h3>gst_pad_add_probe ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gulong"><span class="returnvalue">gulong</span></a>
gst_pad_add_probe (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                   <em class="parameter"><code><a class="link" href="GstPad.html#GstPadProbeType" title="enum GstPadProbeType"><span class="type">GstPadProbeType</span></a> mask</code></em>,
                   <em class="parameter"><code><a class="link" href="GstPad.html#GstPadProbeCallback" title="GstPadProbeCallback ()"><span class="type">GstPadProbeCallback</span></a> callback</code></em>,
                   <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>,
                   <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> destroy_data</code></em>);</pre>
<p>Be notified of different states of pads. The provided callback is called for
every state that matches <em class="parameter"><code>mask</code></em>
.</p>
<p>Probes are called in groups: First GST_PAD_PROBE_TYPE_BLOCK probes are
called, then others, then finally GST_PAD_PROBE_TYPE_IDLE. The only
exception here are GST_PAD_PROBE_TYPE_IDLE probes that are called
immediately if the pad is already idle while calling <a class="link" href="GstPad.html#gst-pad-add-probe" title="gst_pad_add_probe ()"><code class="function">gst_pad_add_probe()</code></a>.
In each of the groups, probes are called in the order in which they were
added.</p>
<div class="refsect3">
<a name="gst-pad-add-probe.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to add the probe to</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>mask</p></td>
<td class="parameter_description"><p>the probe mask</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>callback</p></td>
<td class="parameter_description"><p><a class="link" href="GstPad.html#GstPadProbeCallback" title="GstPadProbeCallback ()"><span class="type">GstPadProbeCallback</span></a> that will be called with notifications of
the pad state</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user data passed to the callback. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="This parameter is a 'user_data', for callbacks; many bindings can pass NULL here."><span class="acronym">closure</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>destroy_data</p></td>
<td class="parameter_description"><p><a href="/usr/share/gtk-doc/html/glib/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> for user_data</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-add-probe.returns"></a><h4>Returns</h4>
<p> an id or 0 if no probe is pending. The id can be used to remove the
probe with <a class="link" href="GstPad.html#gst-pad-remove-probe" title="gst_pad_remove_probe ()"><code class="function">gst_pad_remove_probe()</code></a>. When using GST_PAD_PROBE_TYPE_IDLE it can
happen that the probe can be run immediately and if the probe returns
GST_PAD_PROBE_REMOVE this functions returns 0.</p>
<p>MT safe.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-remove-probe"></a><h3>gst_pad_remove_probe ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_pad_remove_probe (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                      <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gulong"><span class="type">gulong</span></a> id</code></em>);</pre>
<p>Remove the probe with <em class="parameter"><code>id</code></em>
 from <em class="parameter"><code>pad</code></em>
.</p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-pad-remove-probe.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> with the probe</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>id</p></td>
<td class="parameter_description"><p>the probe id to remove</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-is-blocked"></a><h3>gst_pad_is_blocked ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_is_blocked (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>);</pre>
<p>Checks if the pad is blocked or not. This function returns the
last requested state of the pad. It is not certain that the pad
is actually blocking at this point (see <a class="link" href="GstPad.html#gst-pad-is-blocking" title="gst_pad_is_blocking ()"><code class="function">gst_pad_is_blocking()</code></a>).</p>
<div class="refsect3">
<a name="gst-pad-is-blocked.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to query</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-is-blocked.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the pad is blocked.</p>
<p>MT safe.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-is-blocking"></a><h3>gst_pad_is_blocking ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_is_blocking (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>);</pre>
<p>Checks if the pad is blocking or not. This is a guaranteed state
of whether the pad is actually blocking on a <a class="link" href="GstBuffer.html" title="GstBuffer"><span class="type">GstBuffer</span></a> or a <a class="link" href="GstEvent.html" title="GstEvent"><span class="type">GstEvent</span></a>.</p>
<div class="refsect3">
<a name="gst-pad-is-blocking.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to query</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-is-blocking.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the pad is blocking.</p>
<p>MT safe.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-get-offset"></a><h3>gst_pad_get_offset ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint64"><span class="returnvalue">gint64</span></a>
gst_pad_get_offset (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>);</pre>
<p>Get the offset applied to the running time of <em class="parameter"><code>pad</code></em>
. <em class="parameter"><code>pad</code></em>
 has to be a source
pad.</p>
<div class="refsect3">
<a name="gst-pad-get-offset.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-get-offset.returns"></a><h4>Returns</h4>
<p> the offset.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-set-offset"></a><h3>gst_pad_set_offset ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_pad_set_offset (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                    <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint64"><span class="type">gint64</span></a> offset</code></em>);</pre>
<p>Set the offset that will be applied to the running time of <em class="parameter"><code>pad</code></em>
.</p>
<div class="refsect3">
<a name="gst-pad-set-offset.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>offset</p></td>
<td class="parameter_description"><p>the offset</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-new"></a><h3>gst_pad_new ()</h3>
<pre class="programlisting"><a class="link" href="GstPad.html" title="GstPad"><span class="returnvalue">GstPad</span></a> *
gst_pad_new (<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>,
             <em class="parameter"><code><a class="link" href="GstPad.html#GstPadDirection" title="enum GstPadDirection"><span class="type">GstPadDirection</span></a> direction</code></em>);</pre>
<p>Creates a new pad with the given name in the given direction.
If name is <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>, a guaranteed unique name (across all pads)
will be assigned.
This function makes a copy of the name so you can safely free the name.</p>
<div class="refsect3">
<a name="gst-pad-new.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>name</p></td>
<td class="parameter_description"><p>the name of the new pad. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>direction</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html#GstPadDirection" title="enum GstPadDirection"><span class="type">GstPadDirection</span></a> of the pad.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-new.returns"></a><h4>Returns</h4>
<p>a new <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Alias for transfer none, used for objects with floating refs."><span class="acronym">transfer floating</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-new-from-template"></a><h3>gst_pad_new_from_template ()</h3>
<pre class="programlisting"><a class="link" href="GstPad.html" title="GstPad"><span class="returnvalue">GstPad</span></a> *
gst_pad_new_from_template (<em class="parameter"><code><a class="link" href="GstPadTemplate.html" title="GstPadTemplate"><span class="type">GstPadTemplate</span></a> *templ</code></em>,
                           <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>);</pre>
<p>Creates a new pad with the given name from the given template.
If name is <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>, a guaranteed unique name (across all pads)
will be assigned.
This function makes a copy of the name so you can safely free the name.</p>
<div class="refsect3">
<a name="gst-pad-new-from-template.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>templ</p></td>
<td class="parameter_description"><p>the pad template to use</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>name</p></td>
<td class="parameter_description"><p>the name of the pad. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-new-from-template.returns"></a><h4>Returns</h4>
<p>a new <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>. </p>
<p><span class="annotation">[<acronym title="Alias for transfer none, used for objects with floating refs."><span class="acronym">transfer floating</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-new-from-static-template"></a><h3>gst_pad_new_from_static_template ()</h3>
<pre class="programlisting"><a class="link" href="GstPad.html" title="GstPad"><span class="returnvalue">GstPad</span></a> *
gst_pad_new_from_static_template (<em class="parameter"><code><a class="link" href="GstPadTemplate.html#GstStaticPadTemplate" title="struct GstStaticPadTemplate"><span class="type">GstStaticPadTemplate</span></a> *templ</code></em>,
                                  <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>);</pre>
<p>Creates a new pad with the given name from the given static template.
If name is <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>, a guaranteed unique name (across all pads)
will be assigned.
This function makes a copy of the name so you can safely free the name.</p>
<div class="refsect3">
<a name="gst-pad-new-from-static-template.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>templ</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPadTemplate.html#GstStaticPadTemplate" title="struct GstStaticPadTemplate"><span class="type">GstStaticPadTemplate</span></a> to use</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>name</p></td>
<td class="parameter_description"><p>the name of the pad</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-new-from-static-template.returns"></a><h4>Returns</h4>
<p>a new <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>. </p>
<p><span class="annotation">[<acronym title="Alias for transfer none, used for objects with floating refs."><span class="acronym">transfer floating</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-set-chain-function"></a><h3>gst_pad_set_chain_function()</h3>
<pre class="programlisting">#define gst_pad_set_chain_function(p,f)         gst_pad_set_chain_function_full((p),(f),NULL,NULL)
</pre>
<p>Calls <a class="link" href="GstPad.html#gst-pad-set-chain-function-full" title="gst_pad_set_chain_function_full ()"><code class="function">gst_pad_set_chain_function_full()</code></a> with <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> for the user_data and
notify.</p>
<div class="refsect3">
<a name="gst-pad-set-chain-function.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>p</p></td>
<td class="parameter_description"><p>a sink <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>f</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html#GstPadChainFunction" title="GstPadChainFunction ()"><span class="type">GstPadChainFunction</span></a> to set.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-set-chain-function-full"></a><h3>gst_pad_set_chain_function_full ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_pad_set_chain_function_full (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                                 <em class="parameter"><code><a class="link" href="GstPad.html#GstPadChainFunction" title="GstPadChainFunction ()"><span class="type">GstPadChainFunction</span></a> chain</code></em>,
                                 <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>,
                                 <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> notify</code></em>);</pre>
<p>Sets the given chain function for the pad. The chain function is called to
process a <a class="link" href="GstBuffer.html" title="GstBuffer"><span class="type">GstBuffer</span></a> input buffer. see <a class="link" href="GstPad.html#GstPadChainFunction" title="GstPadChainFunction ()"><span class="type">GstPadChainFunction</span></a> for more details.</p>
<div class="refsect3">
<a name="gst-pad-set-chain-function-full.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a sink <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>chain</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html#GstPadChainFunction" title="GstPadChainFunction ()"><span class="type">GstPadChainFunction</span></a> to set.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user_data passed to <em class="parameter"><code>notify</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>notify</p></td>
<td class="parameter_description"><p>notify called when <em class="parameter"><code>chain</code></em>
will not be used anymore.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GstPadChainFunction"></a><h3>GstPadChainFunction ()</h3>
<pre class="programlisting"><a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a>
<span class="c_punctuation">(</span>*GstPadChainFunction<span class="c_punctuation">)</span> (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                        <em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *parent</code></em>,
                        <em class="parameter"><code><a class="link" href="GstBuffer.html" title="GstBuffer"><span class="type">GstBuffer</span></a> *buffer</code></em>);</pre>
<p>A function that will be called on sinkpads when chaining buffers.
The function typically processes the data contained in the buffer and
either consumes the data or passes it on to the internally linked pad(s).</p>
<p>The implementer of this function receives a refcount to <em class="parameter"><code>buffer</code></em>
 and should
<a class="link" href="GstBuffer.html#gst-buffer-unref" title="gst_buffer_unref ()"><code class="function">gst_buffer_unref()</code></a> when the buffer is no longer needed.</p>
<p>When a chain function detects an error in the data stream, it must post an
error on the bus and return an appropriate <a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="type">GstFlowReturn</span></a> value.</p>
<div class="refsect3">
<a name="GstPadChainFunction.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the sink <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> that performed the chain.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>parent</p></td>
<td class="parameter_description"><p>the parent of <em class="parameter"><code>pad</code></em>
. If the <a class="link" href="GstPad.html#GST-PAD-FLAG-NEED-PARENT:CAPS"><span class="type">GST_PAD_FLAG_NEED_PARENT</span></a>
flag is set, <em class="parameter"><code>parent</code></em>
is guaranteed to be not-<a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> and remain valid
during the execution of this function. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>buffer</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstBuffer.html" title="GstBuffer"><span class="type">GstBuffer</span></a> that is chained, not <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="GstPadChainFunction.returns"></a><h4>Returns</h4>
<p> <a class="link" href="GstPad.html#GST-FLOW-OK:CAPS"><span class="type">GST_FLOW_OK</span></a> for success</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-set-chain-list-function"></a><h3>gst_pad_set_chain_list_function()</h3>
<pre class="programlisting">#define gst_pad_set_chain_list_function(p,f)    gst_pad_set_chain_list_function_full((p),(f),NULL,NULL)
</pre>
<p>Calls <a class="link" href="GstPad.html#gst-pad-set-chain-list-function-full" title="gst_pad_set_chain_list_function_full ()"><code class="function">gst_pad_set_chain_list_function_full()</code></a> with <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> for the user_data and
notify.</p>
<div class="refsect3">
<a name="gst-pad-set-chain-list-function.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>p</p></td>
<td class="parameter_description"><p>a sink <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>f</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html#GstPadChainListFunction" title="GstPadChainListFunction ()"><span class="type">GstPadChainListFunction</span></a> to set.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-set-chain-list-function-full"></a><h3>gst_pad_set_chain_list_function_full ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_pad_set_chain_list_function_full (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                                      <em class="parameter"><code><a class="link" href="GstPad.html#GstPadChainListFunction" title="GstPadChainListFunction ()"><span class="type">GstPadChainListFunction</span></a> chainlist</code></em>,
                                      <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>,
                                      <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> notify</code></em>);</pre>
<p>Sets the given chain list function for the pad. The chainlist function is
called to process a <a class="link" href="GstBufferList.html" title="GstBufferList"><span class="type">GstBufferList</span></a> input buffer list. See
<a class="link" href="GstPad.html#GstPadChainListFunction" title="GstPadChainListFunction ()"><span class="type">GstPadChainListFunction</span></a> for more details.</p>
<div class="refsect3">
<a name="gst-pad-set-chain-list-function-full.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a sink <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>chainlist</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html#GstPadChainListFunction" title="GstPadChainListFunction ()"><span class="type">GstPadChainListFunction</span></a> to set.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user_data passed to <em class="parameter"><code>notify</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>notify</p></td>
<td class="parameter_description"><p>notify called when <em class="parameter"><code>chainlist</code></em>
will not be used anymore.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GstPadChainListFunction"></a><h3>GstPadChainListFunction ()</h3>
<pre class="programlisting"><a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a>
<span class="c_punctuation">(</span>*GstPadChainListFunction<span class="c_punctuation">)</span> (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                            <em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *parent</code></em>,
                            <em class="parameter"><code><a class="link" href="GstBufferList.html" title="GstBufferList"><span class="type">GstBufferList</span></a> *list</code></em>);</pre>
<p>A function that will be called on sinkpads when chaining buffer lists.
The function typically processes the data contained in the buffer list and
either consumes the data or passes it on to the internally linked pad(s).</p>
<p>The implementer of this function receives a refcount to <em class="parameter"><code>list</code></em>
 and
should <a class="link" href="GstBufferList.html#gst-buffer-list-unref" title="gst_buffer_list_unref ()"><code class="function">gst_buffer_list_unref()</code></a> when the list is no longer needed.</p>
<p>When a chainlist function detects an error in the data stream, it must
post an error on the bus and return an appropriate <a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="type">GstFlowReturn</span></a> value.</p>
<div class="refsect3">
<a name="GstPadChainListFunction.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the sink <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> that performed the chain.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>parent</p></td>
<td class="parameter_description"><p>the parent of <em class="parameter"><code>pad</code></em>
. If the <a class="link" href="GstPad.html#GST-PAD-FLAG-NEED-PARENT:CAPS"><span class="type">GST_PAD_FLAG_NEED_PARENT</span></a>
flag is set, <em class="parameter"><code>parent</code></em>
is guaranteed to be not-<a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> and remain valid
during the execution of this function. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>list</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstBufferList.html" title="GstBufferList"><span class="type">GstBufferList</span></a> that is chained, not <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="GstPadChainListFunction.returns"></a><h4>Returns</h4>
<p> <a class="link" href="GstPad.html#GST-FLOW-OK:CAPS"><span class="type">GST_FLOW_OK</span></a> for success</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-get-range"></a><h3>gst_pad_get_range ()</h3>
<pre class="programlisting"><a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a>
gst_pad_get_range (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                   <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a> offset</code></em>,
                   <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> size</code></em>,
                   <em class="parameter"><code><a class="link" href="GstBuffer.html" title="GstBuffer"><span class="type">GstBuffer</span></a> **buffer</code></em>);</pre>
<p>When <em class="parameter"><code>pad</code></em>
 is flushing this function returns <a class="link" href="GstPad.html#GST-FLOW-FLUSHING:CAPS"><span class="type">GST_FLOW_FLUSHING</span></a>
immediately and <em class="parameter"><code>buffer</code></em>
 is <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.</p>
<p>Calls the getrange function of <em class="parameter"><code>pad</code></em>
, see <a class="link" href="GstPad.html#GstPadGetRangeFunction" title="GstPadGetRangeFunction ()"><span class="type">GstPadGetRangeFunction</span></a> for a
description of a getrange function. If <em class="parameter"><code>pad</code></em>
 has no getrange function
installed (see <a class="link" href="GstPad.html#gst-pad-set-getrange-function" title="gst_pad_set_getrange_function()"><code class="function">gst_pad_set_getrange_function()</code></a>) this function returns
<a class="link" href="GstPad.html#GST-FLOW-NOT-SUPPORTED:CAPS"><span class="type">GST_FLOW_NOT_SUPPORTED</span></a>.</p>
<p>If <em class="parameter"><code>buffer</code></em>
 points to a variable holding <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>, a valid new <a class="link" href="GstBuffer.html" title="GstBuffer"><span class="type">GstBuffer</span></a> will be
placed in <em class="parameter"><code>buffer</code></em>
 when this function returns <a class="link" href="GstPad.html#GST-FLOW-OK:CAPS"><span class="type">GST_FLOW_OK</span></a>. The new buffer
must be freed with <a class="link" href="GstBuffer.html#gst-buffer-unref" title="gst_buffer_unref ()"><code class="function">gst_buffer_unref()</code></a> after usage.</p>
<p>When <em class="parameter"><code>buffer</code></em>
 points to a variable that points to a valid <a class="link" href="GstBuffer.html" title="GstBuffer"><span class="type">GstBuffer</span></a>, the
buffer will be filled with the result data when this function returns
<a class="link" href="GstPad.html#GST-FLOW-OK:CAPS"><span class="type">GST_FLOW_OK</span></a>. If the provided buffer is larger than <em class="parameter"><code>size</code></em>
, only
<em class="parameter"><code>size</code></em>
 bytes will be filled in the result buffer and its size will be updated
accordingly.</p>
<p>Note that less than <em class="parameter"><code>size</code></em>
 bytes can be returned in <em class="parameter"><code>buffer</code></em>
 when, for example,
an EOS condition is near or when <em class="parameter"><code>buffer</code></em>
 is not large enough to hold <em class="parameter"><code>size</code></em>

bytes. The caller should check the result buffer size to get the result size.</p>
<p>When this function returns any other result value than <a class="link" href="GstPad.html#GST-FLOW-OK:CAPS"><span class="type">GST_FLOW_OK</span></a>, <em class="parameter"><code>buffer</code></em>

will be unchanged.</p>
<p>This is a lowlevel function. Usually <a class="link" href="GstPad.html#gst-pad-pull-range" title="gst_pad_pull_range ()"><code class="function">gst_pad_pull_range()</code></a> is used.</p>
<div class="refsect3">
<a name="gst-pad-get-range.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a src <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>, returns <a class="link" href="GstPad.html#GST-FLOW-ERROR:CAPS"><span class="type">GST_FLOW_ERROR</span></a> if not.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>offset</p></td>
<td class="parameter_description"><p>The start offset of the buffer</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>size</p></td>
<td class="parameter_description"><p>The length of the buffer</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>buffer</p></td>
<td class="parameter_description"><p>a pointer to hold the <a class="link" href="GstBuffer.html" title="GstBuffer"><span class="type">GstBuffer</span></a>,
returns <a class="link" href="GstPad.html#GST-FLOW-ERROR:CAPS"><span class="type">GST_FLOW_ERROR</span></a> if <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Out parameter, where caller must allocate storage."><span class="acronym">out callee-allocates</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-get-range.returns"></a><h4>Returns</h4>
<p> a <a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="type">GstFlowReturn</span></a> from the pad.</p>
<p>MT safe.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-set-getrange-function"></a><h3>gst_pad_set_getrange_function()</h3>
<pre class="programlisting">#define gst_pad_set_getrange_function(p,f)      gst_pad_set_getrange_function_full((p),(f),NULL,NULL)
</pre>
<p>Calls <a class="link" href="GstPad.html#gst-pad-set-getrange-function-full" title="gst_pad_set_getrange_function_full ()"><code class="function">gst_pad_set_getrange_function_full()</code></a> with <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> for the user_data and
notify.</p>
<div class="refsect3">
<a name="gst-pad-set-getrange-function.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>p</p></td>
<td class="parameter_description"><p>a source <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>f</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html#GstPadGetRangeFunction" title="GstPadGetRangeFunction ()"><span class="type">GstPadGetRangeFunction</span></a> to set.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-set-getrange-function-full"></a><h3>gst_pad_set_getrange_function_full ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_pad_set_getrange_function_full (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                                    <em class="parameter"><code><a class="link" href="GstPad.html#GstPadGetRangeFunction" title="GstPadGetRangeFunction ()"><span class="type">GstPadGetRangeFunction</span></a> get</code></em>,
                                    <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>,
                                    <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> notify</code></em>);</pre>
<p>Sets the given getrange function for the pad. The getrange function is
called to produce a new <a class="link" href="GstBuffer.html" title="GstBuffer"><span class="type">GstBuffer</span></a> to start the processing pipeline. see
<a class="link" href="GstPad.html#GstPadGetRangeFunction" title="GstPadGetRangeFunction ()"><span class="type">GstPadGetRangeFunction</span></a> for a description of the getrange function.</p>
<div class="refsect3">
<a name="gst-pad-set-getrange-function-full.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a source <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>get</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html#GstPadGetRangeFunction" title="GstPadGetRangeFunction ()"><span class="type">GstPadGetRangeFunction</span></a> to set.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user_data passed to <em class="parameter"><code>notify</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>notify</p></td>
<td class="parameter_description"><p>notify called when <em class="parameter"><code>get</code></em>
will not be used anymore.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GstPadGetRangeFunction"></a><h3>GstPadGetRangeFunction ()</h3>
<pre class="programlisting"><a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a>
<span class="c_punctuation">(</span>*GstPadGetRangeFunction<span class="c_punctuation">)</span> (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                           <em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *parent</code></em>,
                           <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a> offset</code></em>,
                           <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> length</code></em>,
                           <em class="parameter"><code><a class="link" href="GstBuffer.html" title="GstBuffer"><span class="type">GstBuffer</span></a> **buffer</code></em>);</pre>
<p>This function will be called on source pads when a peer element
request a buffer at the specified <em class="parameter"><code>offset</code></em>
 and <em class="parameter"><code>length</code></em>
. If this function
returns <a class="link" href="GstPad.html#GST-FLOW-OK:CAPS"><span class="type">GST_FLOW_OK</span></a>, the result buffer will be stored in <em class="parameter"><code>buffer</code></em>
. The
contents of <em class="parameter"><code>buffer</code></em>
 is invalid for any other return value.</p>
<p>This function is installed on a source pad with
<a class="link" href="GstPad.html#gst-pad-set-getrange-function" title="gst_pad_set_getrange_function()"><code class="function">gst_pad_set_getrange_function()</code></a> and can only be called on source pads after
they are successfully activated with <a class="link" href="GstPad.html#gst-pad-activate-mode" title="gst_pad_activate_mode ()"><code class="function">gst_pad_activate_mode()</code></a> with the
<a class="link" href="GstPad.html#GST-PAD-MODE-PULL:CAPS"><span class="type">GST_PAD_MODE_PULL</span></a>.</p>
<p><em class="parameter"><code>offset</code></em>
 and <em class="parameter"><code>length</code></em>
 are always given in byte units. <em class="parameter"><code>offset</code></em>
 must normally be a value
between 0 and the length in bytes of the data available on <em class="parameter"><code>pad</code></em>
. The
length (duration in bytes) can be retrieved with a <a class="link" href="GstQuery.html#GST-QUERY-DURATION:CAPS"><span class="type">GST_QUERY_DURATION</span></a> or with a
<a class="link" href="GstQuery.html#GST-QUERY-SEEKING:CAPS"><span class="type">GST_QUERY_SEEKING</span></a>.</p>
<p>Any <em class="parameter"><code>offset</code></em>
 larger or equal than the length will make the function return
<a class="link" href="GstPad.html#GST-FLOW-EOS:CAPS"><span class="type">GST_FLOW_EOS</span></a>, which corresponds to EOS. In this case <em class="parameter"><code>buffer</code></em>
 does not
contain a valid buffer.</p>
<p>The buffer size of <em class="parameter"><code>buffer</code></em>
 will only be smaller than <em class="parameter"><code>length</code></em>
 when <em class="parameter"><code>offset</code></em>
 is
near the end of the stream. In all other cases, the size of <em class="parameter"><code>buffer</code></em>
 must be
exactly the requested size.</p>
<p>It is allowed to call this function with a 0 <em class="parameter"><code>length</code></em>
 and valid <em class="parameter"><code>offset</code></em>
, in
which case <em class="parameter"><code>buffer</code></em>
 will contain a 0-sized buffer and the function returns
<a class="link" href="GstPad.html#GST-FLOW-OK:CAPS"><span class="type">GST_FLOW_OK</span></a>.</p>
<p>When this function is called with a -1 <em class="parameter"><code>offset</code></em>
, the sequentially next buffer
of length <em class="parameter"><code>length</code></em>
 in the stream is returned.</p>
<p>When this function is called with a -1 <em class="parameter"><code>length</code></em>
, a buffer with a default
optimal length is returned in <em class="parameter"><code>buffer</code></em>
. The length might depend on the value
of <em class="parameter"><code>offset</code></em>
.</p>
<div class="refsect3">
<a name="GstPadGetRangeFunction.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the src <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to perform the getrange on.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>parent</p></td>
<td class="parameter_description"><p>the parent of <em class="parameter"><code>pad</code></em>
. If the <a class="link" href="GstPad.html#GST-PAD-FLAG-NEED-PARENT:CAPS"><span class="type">GST_PAD_FLAG_NEED_PARENT</span></a>
flag is set, <em class="parameter"><code>parent</code></em>
is guaranteed to be not-<a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> and remain valid
during the execution of this function. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>offset</p></td>
<td class="parameter_description"><p>the offset of the range</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>length</p></td>
<td class="parameter_description"><p>the length of the range</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>buffer</p></td>
<td class="parameter_description"><p>a memory location to hold the result buffer, cannot be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="GstPadGetRangeFunction.returns"></a><h4>Returns</h4>
<p> <a class="link" href="GstPad.html#GST-FLOW-OK:CAPS"><span class="type">GST_FLOW_OK</span></a> for success and a valid buffer in <em class="parameter"><code>buffer</code></em>
. Any other
return value leaves <em class="parameter"><code>buffer</code></em>
undefined.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-set-event-function"></a><h3>gst_pad_set_event_function()</h3>
<pre class="programlisting">#define gst_pad_set_event_function(p,f)         gst_pad_set_event_function_full((p),(f),NULL,NULL)
</pre>
<p>Calls <a class="link" href="GstPad.html#gst-pad-set-event-function-full" title="gst_pad_set_event_function_full ()"><code class="function">gst_pad_set_event_function_full()</code></a> with <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> for the user_data and
notify.</p>
<div class="refsect3">
<a name="gst-pad-set-event-function.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>p</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> of either direction.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>f</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html#GstPadEventFunction" title="GstPadEventFunction ()"><span class="type">GstPadEventFunction</span></a> to set.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-set-event-function-full"></a><h3>gst_pad_set_event_function_full ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_pad_set_event_function_full (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                                 <em class="parameter"><code><a class="link" href="GstPad.html#GstPadEventFunction" title="GstPadEventFunction ()"><span class="type">GstPadEventFunction</span></a> event</code></em>,
                                 <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>,
                                 <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> notify</code></em>);</pre>
<p>Sets the given event handler for the pad.</p>
<div class="refsect3">
<a name="gst-pad-set-event-function-full.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> of either direction.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>event</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html#GstPadEventFunction" title="GstPadEventFunction ()"><span class="type">GstPadEventFunction</span></a> to set.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user_data passed to <em class="parameter"><code>notify</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>notify</p></td>
<td class="parameter_description"><p>notify called when <em class="parameter"><code>event</code></em>
will not be used anymore.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GstPadEventFunction"></a><h3>GstPadEventFunction ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
<span class="c_punctuation">(</span>*GstPadEventFunction<span class="c_punctuation">)</span> (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                        <em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *parent</code></em>,
                        <em class="parameter"><code><a class="link" href="GstEvent.html" title="GstEvent"><span class="type">GstEvent</span></a> *event</code></em>);</pre>
<p>Function signature to handle an event for the pad.</p>
<div class="refsect3">
<a name="GstPadEventFunction.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to handle the event.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>parent</p></td>
<td class="parameter_description"><p>the parent of <em class="parameter"><code>pad</code></em>
. If the <a class="link" href="GstPad.html#GST-PAD-FLAG-NEED-PARENT:CAPS"><span class="type">GST_PAD_FLAG_NEED_PARENT</span></a>
flag is set, <em class="parameter"><code>parent</code></em>
is guaranteed to be not-<a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> and remain valid
during the execution of this function. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>event</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstEvent.html" title="GstEvent"><span class="type">GstEvent</span></a> to handle. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="GstPadEventFunction.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the pad could handle the event.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-set-event-full-function"></a><h3>gst_pad_set_event_full_function()</h3>
<pre class="programlisting">#define gst_pad_set_event_full_function(p,f)    gst_pad_set_event_full_function_full((p),(f),NULL,NULL)
</pre>
<p>Calls <a class="link" href="GstPad.html#gst-pad-set-event-full-function-full" title="gst_pad_set_event_full_function_full ()"><code class="function">gst_pad_set_event_full_function_full()</code></a> with <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> for the user_data and
notify.</p>
<div class="refsect3">
<a name="gst-pad-set-event-full-function.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>p</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> of either direction.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>f</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html#GstPadEventFullFunction" title="GstPadEventFullFunction ()"><span class="type">GstPadEventFullFunction</span></a> to set.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-set-event-full-function-full"></a><h3>gst_pad_set_event_full_function_full ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_pad_set_event_full_function_full (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                                      <em class="parameter"><code><a class="link" href="GstPad.html#GstPadEventFullFunction" title="GstPadEventFullFunction ()"><span class="type">GstPadEventFullFunction</span></a> event</code></em>,
                                      <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>,
                                      <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> notify</code></em>);</pre>
<p>Sets the given event handler for the pad.</p>
<div class="refsect3">
<a name="gst-pad-set-event-full-function-full.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> of either direction.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>event</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html#GstPadEventFullFunction" title="GstPadEventFullFunction ()"><span class="type">GstPadEventFullFunction</span></a> to set.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user_data passed to <em class="parameter"><code>notify</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>notify</p></td>
<td class="parameter_description"><p>notify called when <em class="parameter"><code>event</code></em>
will not be used anymore.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix06.html#api-index-1.8">1.8</a></p>
</div>
<hr>
<div class="refsect2">
<a name="GstPadEventFullFunction"></a><h3>GstPadEventFullFunction ()</h3>
<pre class="programlisting"><a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a>
<span class="c_punctuation">(</span>*GstPadEventFullFunction<span class="c_punctuation">)</span> (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                            <em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *parent</code></em>,
                            <em class="parameter"><code><a class="link" href="GstEvent.html" title="GstEvent"><span class="type">GstEvent</span></a> *event</code></em>);</pre>
<p>Function signature to handle an event for the pad.</p>
<p>This variant is for specific elements that will take into account the
last downstream flow return (from a pad push), in which case they can
return it.</p>
<div class="refsect3">
<a name="GstPadEventFullFunction.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to handle the event.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>parent</p></td>
<td class="parameter_description"><p>the parent of <em class="parameter"><code>pad</code></em>
. If the <a class="link" href="GstPad.html#GST-PAD-FLAG-NEED-PARENT:CAPS"><span class="type">GST_PAD_FLAG_NEED_PARENT</span></a>
flag is set, <em class="parameter"><code>parent</code></em>
is guaranteed to be not-<a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> and remain valid
during the execution of this function. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>event</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstEvent.html" title="GstEvent"><span class="type">GstEvent</span></a> to handle. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="GstPadEventFullFunction.returns"></a><h4>Returns</h4>
<p> <a class="link" href="GstPad.html#GST-FLOW-OK:CAPS"><code class="literal">GST_FLOW_OK</code></a> if the event was handled properly, or any other
<a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="type">GstFlowReturn</span></a> dependent on downstream state.</p>
</div>
<p class="since">Since: <a class="link" href="ix06.html#api-index-1.8">1.8</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-set-link-function"></a><h3>gst_pad_set_link_function()</h3>
<pre class="programlisting">#define gst_pad_set_link_function(p,f)          gst_pad_set_link_function_full((p),(f),NULL,NULL)
</pre>
<p>Calls <a class="link" href="GstPad.html#gst-pad-set-link-function-full" title="gst_pad_set_link_function_full ()"><code class="function">gst_pad_set_link_function_full()</code></a> with <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>
for the user_data and notify.</p>
<div class="refsect3">
<a name="gst-pad-set-link-function.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>p</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>f</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html#GstPadLinkFunction" title="GstPadLinkFunction ()"><span class="type">GstPadLinkFunction</span></a> to set.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-set-link-function-full"></a><h3>gst_pad_set_link_function_full ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_pad_set_link_function_full (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                                <em class="parameter"><code><a class="link" href="GstPad.html#GstPadLinkFunction" title="GstPadLinkFunction ()"><span class="type">GstPadLinkFunction</span></a> link</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> notify</code></em>);</pre>
<p>Sets the given link function for the pad. It will be called when
the pad is linked with another pad.</p>
<p>The return value <a class="link" href="GstPad.html#GST-PAD-LINK-OK:CAPS"><span class="type">GST_PAD_LINK_OK</span></a> should be used when the connection can be
made.</p>
<p>The return value <a class="link" href="GstPad.html#GST-PAD-LINK-REFUSED:CAPS"><span class="type">GST_PAD_LINK_REFUSED</span></a> should be used when the connection
cannot be made for some reason.</p>
<p>If <em class="parameter"><code>link</code></em>
 is installed on a source pad, it should call the <a class="link" href="GstPad.html#GstPadLinkFunction" title="GstPadLinkFunction ()"><span class="type">GstPadLinkFunction</span></a>
of the peer sink pad, if present.</p>
<div class="refsect3">
<a name="gst-pad-set-link-function-full.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>link</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html#GstPadLinkFunction" title="GstPadLinkFunction ()"><span class="type">GstPadLinkFunction</span></a> to set.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user_data passed to <em class="parameter"><code>notify</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>notify</p></td>
<td class="parameter_description"><p>notify called when <em class="parameter"><code>link</code></em>
will not be used anymore.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GstPadLinkFunction"></a><h3>GstPadLinkFunction ()</h3>
<pre class="programlisting"><a class="link" href="GstPad.html#GstPadLinkReturn" title="enum GstPadLinkReturn"><span class="returnvalue">GstPadLinkReturn</span></a>
<span class="c_punctuation">(</span>*GstPadLinkFunction<span class="c_punctuation">)</span> (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                       <em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *parent</code></em>,
                       <em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *peer</code></em>);</pre>
<p>Function signature to handle a new link on the pad.</p>
<div class="refsect3">
<a name="GstPadLinkFunction.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> that is linked.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>parent</p></td>
<td class="parameter_description"><p>the parent of <em class="parameter"><code>pad</code></em>
. If the <a class="link" href="GstPad.html#GST-PAD-FLAG-NEED-PARENT:CAPS"><span class="type">GST_PAD_FLAG_NEED_PARENT</span></a>
flag is set, <em class="parameter"><code>parent</code></em>
is guaranteed to be not-<a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> and remain valid
during the execution of this function. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>peer</p></td>
<td class="parameter_description"><p>the peer <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> of the link</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="GstPadLinkFunction.returns"></a><h4>Returns</h4>
<p> the result of the link with the specified peer.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-set-unlink-function"></a><h3>gst_pad_set_unlink_function()</h3>
<pre class="programlisting">#define gst_pad_set_unlink_function(p,f)        gst_pad_set_unlink_function_full((p),(f),NULL,NULL)
</pre>
<p>Calls <a class="link" href="GstPad.html#gst-pad-set-unlink-function-full" title="gst_pad_set_unlink_function_full ()"><code class="function">gst_pad_set_unlink_function_full()</code></a> with <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>
for the user_data and notify.</p>
<div class="refsect3">
<a name="gst-pad-set-unlink-function.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>p</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>f</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html#GstPadUnlinkFunction" title="GstPadUnlinkFunction ()"><span class="type">GstPadUnlinkFunction</span></a> to set.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-set-unlink-function-full"></a><h3>gst_pad_set_unlink_function_full ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_pad_set_unlink_function_full (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                                  <em class="parameter"><code><a class="link" href="GstPad.html#GstPadUnlinkFunction" title="GstPadUnlinkFunction ()"><span class="type">GstPadUnlinkFunction</span></a> unlink</code></em>,
                                  <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>,
                                  <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> notify</code></em>);</pre>
<p>Sets the given unlink function for the pad. It will be called
when the pad is unlinked.</p>
<p>Note that the pad's lock is already held when the unlink
function is called, so most pad functions cannot be called
from within the callback.</p>
<div class="refsect3">
<a name="gst-pad-set-unlink-function-full.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>unlink</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html#GstPadUnlinkFunction" title="GstPadUnlinkFunction ()"><span class="type">GstPadUnlinkFunction</span></a> to set.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user_data passed to <em class="parameter"><code>notify</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>notify</p></td>
<td class="parameter_description"><p>notify called when <em class="parameter"><code>unlink</code></em>
will not be used anymore.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GstPadUnlinkFunction"></a><h3>GstPadUnlinkFunction ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
<span class="c_punctuation">(</span>*GstPadUnlinkFunction<span class="c_punctuation">)</span> (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                         <em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *parent</code></em>);</pre>
<p>Function signature to handle a unlinking the pad prom its peer.</p>
<p>The pad's lock is already held when the unlink function is called, so most
pad functions cannot be called from within the callback.</p>
<div class="refsect3">
<a name="GstPadUnlinkFunction.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> that is linked.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>parent</p></td>
<td class="parameter_description"><p>the parent of <em class="parameter"><code>pad</code></em>
. If the <a class="link" href="GstPad.html#GST-PAD-FLAG-NEED-PARENT:CAPS"><span class="type">GST_PAD_FLAG_NEED_PARENT</span></a>
flag is set, <em class="parameter"><code>parent</code></em>
is guaranteed to be not-<a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> and remain valid
during the execution of this function. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-proxy-query-caps"></a><h3>gst_pad_proxy_query_caps ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_proxy_query_caps (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                          <em class="parameter"><code><a class="link" href="GstQuery.html" title="GstQuery"><span class="type">GstQuery</span></a> *query</code></em>);</pre>
<p>Calls <a class="link" href="GstPad.html#gst-pad-query-caps" title="gst_pad_query_caps ()"><code class="function">gst_pad_query_caps()</code></a> for all internally linked pads of <em class="parameter"><code>pad</code></em>
 and returns
the intersection of the results.</p>
<p>This function is useful as a default caps query function for an element
that can handle any stream format, but requires all its pads to have
the same caps.  Two such elements are tee and adder.</p>
<div class="refsect3">
<a name="gst-pad-proxy-query-caps.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to proxy.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>query</p></td>
<td class="parameter_description"><p>a CAPS <a class="link" href="GstQuery.html" title="GstQuery"><span class="type">GstQuery</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-proxy-query-caps.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if <em class="parameter"><code>query</code></em>
could be executed</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-proxy-query-accept-caps"></a><h3>gst_pad_proxy_query_accept_caps ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_proxy_query_accept_caps (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                                 <em class="parameter"><code><a class="link" href="GstQuery.html" title="GstQuery"><span class="type">GstQuery</span></a> *query</code></em>);</pre>
<p>Checks if all internally linked pads of <em class="parameter"><code>pad</code></em>
 accepts the caps in <em class="parameter"><code>query</code></em>
 and
returns the intersection of the results.</p>
<p>This function is useful as a default accept caps query function for an element
that can handle any stream format, but requires caps that are acceptable for
all opposite pads.</p>
<div class="refsect3">
<a name="gst-pad-proxy-query-accept-caps.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to proxy.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>query</p></td>
<td class="parameter_description"><p>an ACCEPT_CAPS <a class="link" href="GstQuery.html" title="GstQuery"><span class="type">GstQuery</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-proxy-query-accept-caps.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if <em class="parameter"><code>query</code></em>
could be executed</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-set-activate-function"></a><h3>gst_pad_set_activate_function()</h3>
<pre class="programlisting">#define gst_pad_set_activate_function(p,f)      gst_pad_set_activate_function_full((p),(f),NULL,NULL)
</pre>
<p>Calls <a class="link" href="GstPad.html#gst-pad-set-activate-function-full" title="gst_pad_set_activate_function_full ()"><code class="function">gst_pad_set_activate_function_full()</code></a> with <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> for the user_data and
notify.</p>
<div class="refsect3">
<a name="gst-pad-set-activate-function.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>p</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>f</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html#GstPadActivateFunction" title="GstPadActivateFunction ()"><span class="type">GstPadActivateFunction</span></a> to set.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-set-activate-function-full"></a><h3>gst_pad_set_activate_function_full ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_pad_set_activate_function_full (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                                    <em class="parameter"><code><a class="link" href="GstPad.html#GstPadActivateFunction" title="GstPadActivateFunction ()"><span class="type">GstPadActivateFunction</span></a> activate</code></em>,
                                    <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>,
                                    <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> notify</code></em>);</pre>
<p>Sets the given activate function for <em class="parameter"><code>pad</code></em>
. The activate function will
dispatch to <a class="link" href="GstPad.html#gst-pad-activate-mode" title="gst_pad_activate_mode ()"><code class="function">gst_pad_activate_mode()</code></a> to perform the actual activation.
Only makes sense to set on sink pads.</p>
<p>Call this function if your sink pad can start a pull-based task.</p>
<div class="refsect3">
<a name="gst-pad-set-activate-function-full.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>activate</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html#GstPadActivateFunction" title="GstPadActivateFunction ()"><span class="type">GstPadActivateFunction</span></a> to set.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user_data passed to <em class="parameter"><code>notify</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>notify</p></td>
<td class="parameter_description"><p>notify called when <em class="parameter"><code>activate</code></em>
will not be used anymore.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GstPadActivateFunction"></a><h3>GstPadActivateFunction ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
<span class="c_punctuation">(</span>*GstPadActivateFunction<span class="c_punctuation">)</span> (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                           <em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *parent</code></em>);</pre>
<p>This function is called when the pad is activated during the element
READY to PAUSED state change. By default this function will call the
activate function that puts the pad in push mode but elements can
override this function to activate the pad in pull mode if they wish.</p>
<div class="refsect3">
<a name="GstPadActivateFunction.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>parent</p></td>
<td class="parameter_description"><p>the parent of <em class="parameter"><code>pad</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="GstPadActivateFunction.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the pad could be activated.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-set-activatemode-function"></a><h3>gst_pad_set_activatemode_function()</h3>
<pre class="programlisting">#define gst_pad_set_activatemode_function(p,f)  gst_pad_set_activatemode_function_full((p),(f),NULL,NULL)
</pre>
<p>Calls <a class="link" href="GstPad.html#gst-pad-set-activatemode-function-full" title="gst_pad_set_activatemode_function_full ()"><code class="function">gst_pad_set_activatemode_function_full()</code></a> with <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> for the user_data and
notify.</p>
<div class="refsect3">
<a name="gst-pad-set-activatemode-function.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>p</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>f</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html#GstPadActivateModeFunction" title="GstPadActivateModeFunction ()"><span class="type">GstPadActivateModeFunction</span></a> to set.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-set-activatemode-function-full"></a><h3>gst_pad_set_activatemode_function_full ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_pad_set_activatemode_function_full
                               (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                                <em class="parameter"><code><a class="link" href="GstPad.html#GstPadActivateModeFunction" title="GstPadActivateModeFunction ()"><span class="type">GstPadActivateModeFunction</span></a> activatemode</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> notify</code></em>);</pre>
<p>Sets the given activate_mode function for the pad. An activate_mode function
prepares the element for data passing.</p>
<div class="refsect3">
<a name="gst-pad-set-activatemode-function-full.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>activatemode</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html#GstPadActivateModeFunction" title="GstPadActivateModeFunction ()"><span class="type">GstPadActivateModeFunction</span></a> to set.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user_data passed to <em class="parameter"><code>notify</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>notify</p></td>
<td class="parameter_description"><p>notify called when <em class="parameter"><code>activatemode</code></em>
will not be used anymore.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GstPadActivateModeFunction"></a><h3>GstPadActivateModeFunction ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
<span class="c_punctuation">(</span>*GstPadActivateModeFunction<span class="c_punctuation">)</span> (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                               <em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *parent</code></em>,
                               <em class="parameter"><code><a class="link" href="GstPad.html#GstPadMode" title="enum GstPadMode"><span class="type">GstPadMode</span></a> mode</code></em>,
                               <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> active</code></em>);</pre>
<p>The prototype of the push and pull activate functions.</p>
<div class="refsect3">
<a name="GstPadActivateModeFunction.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>parent</p></td>
<td class="parameter_description"><p>the parent of <em class="parameter"><code>pad</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>mode</p></td>
<td class="parameter_description"><p>the requested activation mode of <em class="parameter"><code>pad</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>active</p></td>
<td class="parameter_description"><p>activate or deactivate the pad.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="GstPadActivateModeFunction.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the pad could be activated or deactivated.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-needs-reconfigure"></a><h3>gst_pad_needs_reconfigure ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_needs_reconfigure (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>);</pre>
<p>Check the <a class="link" href="GstPad.html#GST-PAD-FLAG-NEED-RECONFIGURE:CAPS"><span class="type">GST_PAD_FLAG_NEED_RECONFIGURE</span></a> flag on <em class="parameter"><code>pad</code></em>
 and return <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a>
if the flag was set.</p>
<div class="refsect3">
<a name="gst-pad-needs-reconfigure.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to check</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-needs-reconfigure.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> is the GST_PAD_FLAG_NEED_RECONFIGURE flag is set on <em class="parameter"><code>pad</code></em>
.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-check-reconfigure"></a><h3>gst_pad_check_reconfigure ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_check_reconfigure (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>);</pre>
<p>Check and clear the <a class="link" href="GstPad.html#GST-PAD-FLAG-NEED-RECONFIGURE:CAPS"><span class="type">GST_PAD_FLAG_NEED_RECONFIGURE</span></a> flag on <em class="parameter"><code>pad</code></em>
 and return <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a>
if the flag was set.</p>
<div class="refsect3">
<a name="gst-pad-check-reconfigure.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to check</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-check-reconfigure.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> is the GST_PAD_FLAG_NEED_RECONFIGURE flag was set on <em class="parameter"><code>pad</code></em>
.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-mark-reconfigure"></a><h3>gst_pad_mark_reconfigure ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_pad_mark_reconfigure (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>);</pre>
<p>Mark a pad for needing reconfiguration. The next call to
<a class="link" href="GstPad.html#gst-pad-check-reconfigure" title="gst_pad_check_reconfigure ()"><code class="function">gst_pad_check_reconfigure()</code></a> will return <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> after this call.</p>
<div class="refsect3">
<a name="gst-pad-mark-reconfigure.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to mark</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-push"></a><h3>gst_pad_push ()</h3>
<pre class="programlisting"><a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a>
gst_pad_push (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
              <em class="parameter"><code><a class="link" href="GstBuffer.html" title="GstBuffer"><span class="type">GstBuffer</span></a> *buffer</code></em>);</pre>
<p>Pushes a buffer to the peer of <em class="parameter"><code>pad</code></em>
.</p>
<p>This function will call installed block probes before triggering any
installed data probes.</p>
<p>The function proceeds calling <a class="link" href="GstPad.html#gst-pad-chain" title="gst_pad_chain ()"><code class="function">gst_pad_chain()</code></a> on the peer pad and returns
the value from that function. If <em class="parameter"><code>pad</code></em>
 has no peer, <a class="link" href="GstPad.html#GST-FLOW-NOT-LINKED:CAPS"><span class="type">GST_FLOW_NOT_LINKED</span></a> will
be returned.</p>
<p>In all cases, success or failure, the caller loses its reference to <em class="parameter"><code>buffer</code></em>

after calling this function.</p>
<div class="refsect3">
<a name="gst-pad-push.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a source <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>, returns <a class="link" href="GstPad.html#GST-FLOW-ERROR:CAPS"><span class="type">GST_FLOW_ERROR</span></a> if not.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>buffer</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstBuffer.html" title="GstBuffer"><span class="type">GstBuffer</span></a> to push returns GST_FLOW_ERROR
if not. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-push.returns"></a><h4>Returns</h4>
<p> a <a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="type">GstFlowReturn</span></a> from the peer pad.</p>
<p>MT safe.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-push-event"></a><h3>gst_pad_push_event ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_push_event (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                    <em class="parameter"><code><a class="link" href="GstEvent.html" title="GstEvent"><span class="type">GstEvent</span></a> *event</code></em>);</pre>
<p>Sends the event to the peer of the given pad. This function is
mainly used by elements to send events to their peer
elements.</p>
<p>This function takes ownership of the provided event so you should
<a class="link" href="GstEvent.html#gst-event-ref" title="gst_event_ref ()"><code class="function">gst_event_ref()</code></a> it if you want to reuse the event after this call.</p>
<div class="refsect3">
<a name="gst-pad-push-event.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to push the event to.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>event</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstEvent.html" title="GstEvent"><span class="type">GstEvent</span></a> to send to the pad. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-push-event.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the event was handled.</p>
<p>MT safe.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-push-list"></a><h3>gst_pad_push_list ()</h3>
<pre class="programlisting"><a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a>
gst_pad_push_list (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                   <em class="parameter"><code><a class="link" href="GstBufferList.html" title="GstBufferList"><span class="type">GstBufferList</span></a> *list</code></em>);</pre>
<p>Pushes a buffer list to the peer of <em class="parameter"><code>pad</code></em>
.</p>
<p>This function will call installed block probes before triggering any
installed data probes.</p>
<p>The function proceeds calling the chain function on the peer pad and returns
the value from that function. If <em class="parameter"><code>pad</code></em>
 has no peer, <a class="link" href="GstPad.html#GST-FLOW-NOT-LINKED:CAPS"><span class="type">GST_FLOW_NOT_LINKED</span></a> will
be returned. If the peer pad does not have any installed chainlist function
every group buffer of the list will be merged into a normal <a class="link" href="GstBuffer.html" title="GstBuffer"><span class="type">GstBuffer</span></a> and
chained via <a class="link" href="GstPad.html#gst-pad-chain" title="gst_pad_chain ()"><code class="function">gst_pad_chain()</code></a>.</p>
<p>In all cases, success or failure, the caller loses its reference to <em class="parameter"><code>list</code></em>

after calling this function.</p>
<div class="refsect3">
<a name="gst-pad-push-list.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a source <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>, returns <a class="link" href="GstPad.html#GST-FLOW-ERROR:CAPS"><span class="type">GST_FLOW_ERROR</span></a> if not.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>list</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstBufferList.html" title="GstBufferList"><span class="type">GstBufferList</span></a> to push returns GST_FLOW_ERROR
if not. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-push-list.returns"></a><h4>Returns</h4>
<p> a <a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="type">GstFlowReturn</span></a> from the peer pad.</p>
<p>MT safe.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-pull-range"></a><h3>gst_pad_pull_range ()</h3>
<pre class="programlisting"><a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a>
gst_pad_pull_range (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                    <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a> offset</code></em>,
                    <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> size</code></em>,
                    <em class="parameter"><code><a class="link" href="GstBuffer.html" title="GstBuffer"><span class="type">GstBuffer</span></a> **buffer</code></em>);</pre>
<p>Pulls a <em class="parameter"><code>buffer</code></em>
 from the peer pad or fills up a provided buffer.</p>
<p>This function will first trigger the pad block signal if it was
installed.</p>
<p>When <em class="parameter"><code>pad</code></em>
 is not linked <a class="link" href="GstPad.html#GST-FLOW-NOT-LINKED:CAPS"><span class="type">GST_FLOW_NOT_LINKED</span></a> is returned else this
function returns the result of <a class="link" href="GstPad.html#gst-pad-get-range" title="gst_pad_get_range ()"><code class="function">gst_pad_get_range()</code></a> on the peer pad.
See <a class="link" href="GstPad.html#gst-pad-get-range" title="gst_pad_get_range ()"><code class="function">gst_pad_get_range()</code></a> for a list of return values and for the
semantics of the arguments of this function.</p>
<p>If <em class="parameter"><code>buffer</code></em>
 points to a variable holding <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>, a valid new <a class="link" href="GstBuffer.html" title="GstBuffer"><span class="type">GstBuffer</span></a> will be
placed in <em class="parameter"><code>buffer</code></em>
 when this function returns <a class="link" href="GstPad.html#GST-FLOW-OK:CAPS"><span class="type">GST_FLOW_OK</span></a>. The new buffer
must be freed with <a class="link" href="GstBuffer.html#gst-buffer-unref" title="gst_buffer_unref ()"><code class="function">gst_buffer_unref()</code></a> after usage. When this function
returns any other result value, <em class="parameter"><code>buffer</code></em>
 will still point to <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.</p>
<p>When <em class="parameter"><code>buffer</code></em>
 points to a variable that points to a valid <a class="link" href="GstBuffer.html" title="GstBuffer"><span class="type">GstBuffer</span></a>, the
buffer will be filled with the result data when this function returns
<a class="link" href="GstPad.html#GST-FLOW-OK:CAPS"><span class="type">GST_FLOW_OK</span></a>. When this function returns any other result value,
<em class="parameter"><code>buffer</code></em>
 will be unchanged. If the provided buffer is larger than <em class="parameter"><code>size</code></em>
, only
<em class="parameter"><code>size</code></em>
 bytes will be filled in the result buffer and its size will be updated
accordingly.</p>
<p>Note that less than <em class="parameter"><code>size</code></em>
 bytes can be returned in <em class="parameter"><code>buffer</code></em>
 when, for example,
an EOS condition is near or when <em class="parameter"><code>buffer</code></em>
 is not large enough to hold <em class="parameter"><code>size</code></em>

bytes. The caller should check the result buffer size to get the result size.</p>
<div class="refsect3">
<a name="gst-pad-pull-range.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a sink <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>, returns GST_FLOW_ERROR if not.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>offset</p></td>
<td class="parameter_description"><p>The start offset of the buffer</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>size</p></td>
<td class="parameter_description"><p>The length of the buffer</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>buffer</p></td>
<td class="parameter_description"><p>a pointer to hold the <a class="link" href="GstBuffer.html" title="GstBuffer"><span class="type">GstBuffer</span></a>, returns
GST_FLOW_ERROR if <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Out parameter, where caller must allocate storage."><span class="acronym">out callee-allocates</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-pull-range.returns"></a><h4>Returns</h4>
<p> a <a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="type">GstFlowReturn</span></a> from the peer pad.</p>
<p>MT safe.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-activate-mode"></a><h3>gst_pad_activate_mode ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_activate_mode (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                       <em class="parameter"><code><a class="link" href="GstPad.html#GstPadMode" title="enum GstPadMode"><span class="type">GstPadMode</span></a> mode</code></em>,
                       <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> active</code></em>);</pre>
<p>Activates or deactivates the given pad in <em class="parameter"><code>mode</code></em>
 via dispatching to the
pad's activatemodefunc. For use from within pad activation functions only.</p>
<p>If you don't know what this is, you probably don't want to call it.</p>
<div class="refsect3">
<a name="gst-pad-activate-mode.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to activate or deactivate.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>mode</p></td>
<td class="parameter_description"><p>the requested activation mode</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>active</p></td>
<td class="parameter_description"><p>whether or not the pad should be active.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-activate-mode.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the operation was successful.</p>
<p>MT safe.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-send-event"></a><h3>gst_pad_send_event ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_send_event (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                    <em class="parameter"><code><a class="link" href="GstEvent.html" title="GstEvent"><span class="type">GstEvent</span></a> *event</code></em>);</pre>
<p>Sends the event to the pad. This function can be used
by applications to send events in the pipeline.</p>
<p>If <em class="parameter"><code>pad</code></em>
 is a source pad, <em class="parameter"><code>event</code></em>
 should be an upstream event. If <em class="parameter"><code>pad</code></em>
 is a
sink pad, <em class="parameter"><code>event</code></em>
 should be a downstream event. For example, you would not
send a <a class="link" href="GstEvent.html#GST-EVENT-EOS:CAPS"><span class="type">GST_EVENT_EOS</span></a> on a src pad; EOS events only propagate downstream.
Furthermore, some downstream events have to be serialized with data flow,
like EOS, while some can travel out-of-band, like <a class="link" href="GstEvent.html#GST-EVENT-FLUSH-START:CAPS"><span class="type">GST_EVENT_FLUSH_START</span></a>. If
the event needs to be serialized with data flow, this function will take the
pad's stream lock while calling its event function.</p>
<p>To find out whether an event type is upstream, downstream, or downstream and
serialized, see <a class="link" href="GstEvent.html#GstEventTypeFlags" title="enum GstEventTypeFlags"><span class="type">GstEventTypeFlags</span></a>, <a class="link" href="GstEvent.html#gst-event-type-get-flags" title="gst_event_type_get_flags ()"><code class="function">gst_event_type_get_flags()</code></a>,
<a class="link" href="GstEvent.html#GST-EVENT-IS-UPSTREAM:CAPS" title="GST_EVENT_IS_UPSTREAM()"><span class="type">GST_EVENT_IS_UPSTREAM</span></a>, <a class="link" href="GstEvent.html#GST-EVENT-IS-DOWNSTREAM:CAPS" title="GST_EVENT_IS_DOWNSTREAM()"><span class="type">GST_EVENT_IS_DOWNSTREAM</span></a>, and
<a class="link" href="GstEvent.html#GST-EVENT-IS-SERIALIZED:CAPS" title="GST_EVENT_IS_SERIALIZED()"><span class="type">GST_EVENT_IS_SERIALIZED</span></a>. Note that in practice that an application or
plugin doesn't need to bother itself with this information; the core handles
all necessary locks and checks.</p>
<p>This function takes ownership of the provided event so you should
<a class="link" href="GstEvent.html#gst-event-ref" title="gst_event_ref ()"><code class="function">gst_event_ref()</code></a> it if you want to reuse the event after this call.</p>
<div class="refsect3">
<a name="gst-pad-send-event.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to send the event to.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>event</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstEvent.html" title="GstEvent"><span class="type">GstEvent</span></a> to send to the pad. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-send-event.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the event was handled.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-event-default"></a><h3>gst_pad_event_default ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_event_default (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                       <em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *parent</code></em>,
                       <em class="parameter"><code><a class="link" href="GstEvent.html" title="GstEvent"><span class="type">GstEvent</span></a> *event</code></em>);</pre>
<p>Invokes the default event handler for the given pad.</p>
<p>The EOS event will pause the task associated with <em class="parameter"><code>pad</code></em>
 before it is forwarded
to all internally linked pads,</p>
<p>The event is sent to all pads internally linked to <em class="parameter"><code>pad</code></em>
. This function
takes ownership of <em class="parameter"><code>event</code></em>
.</p>
<div class="refsect3">
<a name="gst-pad-event-default.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to call the default event handler on.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>parent</p></td>
<td class="parameter_description"><p>the parent of <em class="parameter"><code>pad</code></em>
or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>event</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstEvent.html" title="GstEvent"><span class="type">GstEvent</span></a> to handle. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-event-default.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the event was sent successfully.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-query"></a><h3>gst_pad_query ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_query (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
               <em class="parameter"><code><a class="link" href="GstQuery.html" title="GstQuery"><span class="type">GstQuery</span></a> *query</code></em>);</pre>
<p>Dispatches a query to a pad. The query should have been allocated by the
caller via one of the type-specific allocation functions. The element that
the pad belongs to is responsible for filling the query with an appropriate
response, which should then be parsed with a type-specific query parsing
function.</p>
<p>Again, the caller is responsible for both the allocation and deallocation of
the query structure.</p>
<p>Please also note that some queries might need a running pipeline to work.</p>
<div class="refsect3">
<a name="gst-pad-query.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to invoke the default query on.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>query</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstQuery.html" title="GstQuery"><span class="type">GstQuery</span></a> to perform. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-query.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the query could be performed.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-peer-query"></a><h3>gst_pad_peer_query ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_peer_query (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                    <em class="parameter"><code><a class="link" href="GstQuery.html" title="GstQuery"><span class="type">GstQuery</span></a> *query</code></em>);</pre>
<p>Performs <a class="link" href="GstPad.html#gst-pad-query" title="gst_pad_query ()"><code class="function">gst_pad_query()</code></a> on the peer of <em class="parameter"><code>pad</code></em>
.</p>
<p>The caller is responsible for both the allocation and deallocation of
the query structure.</p>
<div class="refsect3">
<a name="gst-pad-peer-query.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to invoke the peer query on.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>query</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstQuery.html" title="GstQuery"><span class="type">GstQuery</span></a> to perform. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-peer-query.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the query could be performed. This function returns <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>
if <em class="parameter"><code>pad</code></em>
has no peer.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-query-default"></a><h3>gst_pad_query_default ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_query_default (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                       <em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *parent</code></em>,
                       <em class="parameter"><code><a class="link" href="GstQuery.html" title="GstQuery"><span class="type">GstQuery</span></a> *query</code></em>);</pre>
<p>Invokes the default query handler for the given pad.
The query is sent to all pads internally linked to <em class="parameter"><code>pad</code></em>
. Note that
if there are many possible sink pads that are internally linked to
<em class="parameter"><code>pad</code></em>
, only one will be sent the query.
Multi-sinkpad elements should implement custom query handlers.</p>
<div class="refsect3">
<a name="gst-pad-query-default.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to call the default query handler on.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>parent</p></td>
<td class="parameter_description"><p>the parent of <em class="parameter"><code>pad</code></em>
or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>query</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstQuery.html" title="GstQuery"><span class="type">GstQuery</span></a> to handle. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-query-default.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the query was performed successfully.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-query-position"></a><h3>gst_pad_query_position ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_query_position (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                        <em class="parameter"><code><a class="link" href="gstreamer-GstFormat.html#GstFormat" title="enum GstFormat"><span class="type">GstFormat</span></a> format</code></em>,
                        <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint64"><span class="type">gint64</span></a> *cur</code></em>);</pre>
<p>Queries a pad for the stream position.</p>
<div class="refsect3">
<a name="gst-pad-query-position.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to invoke the position query on.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>format</p></td>
<td class="parameter_description"><p>the <a class="link" href="gstreamer-GstFormat.html#GstFormat" title="enum GstFormat"><span class="type">GstFormat</span></a> requested</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>cur</p></td>
<td class="parameter_description"><p>A location in which to store the current position, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-query-position.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the query could be performed.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-query-duration"></a><h3>gst_pad_query_duration ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_query_duration (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                        <em class="parameter"><code><a class="link" href="gstreamer-GstFormat.html#GstFormat" title="enum GstFormat"><span class="type">GstFormat</span></a> format</code></em>,
                        <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint64"><span class="type">gint64</span></a> *duration</code></em>);</pre>
<p>Queries a pad for the total stream duration.</p>
<div class="refsect3">
<a name="gst-pad-query-duration.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to invoke the duration query on.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>format</p></td>
<td class="parameter_description"><p>the <a class="link" href="gstreamer-GstFormat.html#GstFormat" title="enum GstFormat"><span class="type">GstFormat</span></a> requested</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>duration</p></td>
<td class="parameter_description"><p>a location in which to store the total
duration, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-query-duration.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the query could be performed.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-query-convert"></a><h3>gst_pad_query_convert ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_query_convert (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                       <em class="parameter"><code><a class="link" href="gstreamer-GstFormat.html#GstFormat" title="enum GstFormat"><span class="type">GstFormat</span></a> src_format</code></em>,
                       <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint64"><span class="type">gint64</span></a> src_val</code></em>,
                       <em class="parameter"><code><a class="link" href="gstreamer-GstFormat.html#GstFormat" title="enum GstFormat"><span class="type">GstFormat</span></a> dest_format</code></em>,
                       <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint64"><span class="type">gint64</span></a> *dest_val</code></em>);</pre>
<p>Queries a pad to convert <em class="parameter"><code>src_val</code></em>
 in <em class="parameter"><code>src_format</code></em>
 to <em class="parameter"><code>dest_format</code></em>
.</p>
<div class="refsect3">
<a name="gst-pad-query-convert.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to invoke the convert query on.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>src_format</p></td>
<td class="parameter_description"><p>a <a class="link" href="gstreamer-GstFormat.html#GstFormat" title="enum GstFormat"><span class="type">GstFormat</span></a> to convert from.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>src_val</p></td>
<td class="parameter_description"><p>a value to convert.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>dest_format</p></td>
<td class="parameter_description"><p>the <a class="link" href="gstreamer-GstFormat.html#GstFormat" title="enum GstFormat"><span class="type">GstFormat</span></a> to convert to.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>dest_val</p></td>
<td class="parameter_description"><p>a pointer to the result. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-query-convert.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the query could be performed.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-query-accept-caps"></a><h3>gst_pad_query_accept_caps ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_query_accept_caps (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                           <em class="parameter"><code><a class="link" href="GstCaps.html" title="GstCaps"><span class="type">GstCaps</span></a> *caps</code></em>);</pre>
<p>Check if the given pad accepts the caps.</p>
<div class="refsect3">
<a name="gst-pad-query-accept-caps.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to check</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>caps</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstCaps.html" title="GstCaps"><span class="type">GstCaps</span></a> to check on the pad</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-query-accept-caps.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the pad can accept the caps.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-query-caps"></a><h3>gst_pad_query_caps ()</h3>
<pre class="programlisting"><a class="link" href="GstCaps.html" title="GstCaps"><span class="returnvalue">GstCaps</span></a> *
gst_pad_query_caps (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                    <em class="parameter"><code><a class="link" href="GstCaps.html" title="GstCaps"><span class="type">GstCaps</span></a> *filter</code></em>);</pre>
<p>Gets the capabilities this pad can produce or consume.
Note that this method doesn't necessarily return the caps set by sending a
<a class="link" href="GstEvent.html#gst-event-new-caps" title="gst_event_new_caps ()"><code class="function">gst_event_new_caps()</code></a> - use <a class="link" href="GstPad.html#gst-pad-get-current-caps" title="gst_pad_get_current_caps ()"><code class="function">gst_pad_get_current_caps()</code></a> for that instead.
gst_pad_query_caps returns all possible caps a pad can operate with, using
the pad's CAPS query function, If the query fails, this function will return
<em class="parameter"><code>filter</code></em>
, if not <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>, otherwise ANY.</p>
<p>When called on sinkpads <em class="parameter"><code>filter</code></em>
 contains the caps that
upstream could produce in the order preferred by upstream. When
called on srcpads <em class="parameter"><code>filter</code></em>
 contains the caps accepted by
downstream in the preferred order. <em class="parameter"><code>filter</code></em>
 might be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> but
if it is not <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> the returned caps will be a subset of <em class="parameter"><code>filter</code></em>
.</p>
<p>Note that this function does not return writable <a class="link" href="GstCaps.html" title="GstCaps"><span class="type">GstCaps</span></a>, use
<a class="link" href="GstCaps.html#gst-caps-make-writable" title="gst_caps_make_writable()"><code class="function">gst_caps_make_writable()</code></a> before modifying the caps.</p>
<div class="refsect3">
<a name="gst-pad-query-caps.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a  <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to get the capabilities of.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>filter</p></td>
<td class="parameter_description"><p>suggested <a class="link" href="GstCaps.html" title="GstCaps"><span class="type">GstCaps</span></a>, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-query-caps.returns"></a><h4>Returns</h4>
<p>the caps of the pad with incremented ref-count. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-peer-query-position"></a><h3>gst_pad_peer_query_position ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_peer_query_position (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                             <em class="parameter"><code><a class="link" href="gstreamer-GstFormat.html#GstFormat" title="enum GstFormat"><span class="type">GstFormat</span></a> format</code></em>,
                             <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint64"><span class="type">gint64</span></a> *cur</code></em>);</pre>
<p>Queries the peer of a given sink pad for the stream position.</p>
<div class="refsect3">
<a name="gst-pad-peer-query-position.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> on whose peer to invoke the position query on.
Must be a sink pad.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>format</p></td>
<td class="parameter_description"><p>the <a class="link" href="gstreamer-GstFormat.html#GstFormat" title="enum GstFormat"><span class="type">GstFormat</span></a> requested</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>cur</p></td>
<td class="parameter_description"><p>a location in which to store the current
position, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-peer-query-position.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the query could be performed.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-peer-query-duration"></a><h3>gst_pad_peer_query_duration ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_peer_query_duration (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                             <em class="parameter"><code><a class="link" href="gstreamer-GstFormat.html#GstFormat" title="enum GstFormat"><span class="type">GstFormat</span></a> format</code></em>,
                             <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint64"><span class="type">gint64</span></a> *duration</code></em>);</pre>
<p>Queries the peer pad of a given sink pad for the total stream duration.</p>
<div class="refsect3">
<a name="gst-pad-peer-query-duration.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> on whose peer pad to invoke the duration query on.
Must be a sink pad.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>format</p></td>
<td class="parameter_description"><p>the <a class="link" href="gstreamer-GstFormat.html#GstFormat" title="enum GstFormat"><span class="type">GstFormat</span></a> requested</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>duration</p></td>
<td class="parameter_description"><p>a location in which to store the total
duration, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-peer-query-duration.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the query could be performed.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-peer-query-convert"></a><h3>gst_pad_peer_query_convert ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_peer_query_convert (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                            <em class="parameter"><code><a class="link" href="gstreamer-GstFormat.html#GstFormat" title="enum GstFormat"><span class="type">GstFormat</span></a> src_format</code></em>,
                            <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint64"><span class="type">gint64</span></a> src_val</code></em>,
                            <em class="parameter"><code><a class="link" href="gstreamer-GstFormat.html#GstFormat" title="enum GstFormat"><span class="type">GstFormat</span></a> dest_format</code></em>,
                            <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint64"><span class="type">gint64</span></a> *dest_val</code></em>);</pre>
<p>Queries the peer pad of a given sink pad to convert <em class="parameter"><code>src_val</code></em>
 in <em class="parameter"><code>src_format</code></em>

to <em class="parameter"><code>dest_format</code></em>
.</p>
<div class="refsect3">
<a name="gst-pad-peer-query-convert.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>, on whose peer pad to invoke the convert query on.
Must be a sink pad.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>src_format</p></td>
<td class="parameter_description"><p>a <a class="link" href="gstreamer-GstFormat.html#GstFormat" title="enum GstFormat"><span class="type">GstFormat</span></a> to convert from.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>src_val</p></td>
<td class="parameter_description"><p>a value to convert.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>dest_format</p></td>
<td class="parameter_description"><p>the <a class="link" href="gstreamer-GstFormat.html#GstFormat" title="enum GstFormat"><span class="type">GstFormat</span></a> to convert to.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>dest_val</p></td>
<td class="parameter_description"><p>a pointer to the result. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-peer-query-convert.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the query could be performed.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-peer-query-accept-caps"></a><h3>gst_pad_peer_query_accept_caps ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_peer_query_accept_caps (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                                <em class="parameter"><code><a class="link" href="GstCaps.html" title="GstCaps"><span class="type">GstCaps</span></a> *caps</code></em>);</pre>
<p>Check if the peer of <em class="parameter"><code>pad</code></em>
 accepts <em class="parameter"><code>caps</code></em>
. If <em class="parameter"><code>pad</code></em>
 has no peer, this function
returns <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a>.</p>
<div class="refsect3">
<a name="gst-pad-peer-query-accept-caps.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a  <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to check the peer of</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>caps</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstCaps.html" title="GstCaps"><span class="type">GstCaps</span></a> to check on the pad</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-peer-query-accept-caps.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the peer of <em class="parameter"><code>pad</code></em>
can accept the caps or <em class="parameter"><code>pad</code></em>
has no peer.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-peer-query-caps"></a><h3>gst_pad_peer_query_caps ()</h3>
<pre class="programlisting"><a class="link" href="GstCaps.html" title="GstCaps"><span class="returnvalue">GstCaps</span></a> *
gst_pad_peer_query_caps (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                         <em class="parameter"><code><a class="link" href="GstCaps.html" title="GstCaps"><span class="type">GstCaps</span></a> *filter</code></em>);</pre>
<p>Gets the capabilities of the peer connected to this pad. Similar to
<a class="link" href="GstPad.html#gst-pad-query-caps" title="gst_pad_query_caps ()"><code class="function">gst_pad_query_caps()</code></a>.</p>
<p>When called on srcpads <em class="parameter"><code>filter</code></em>
 contains the caps that
upstream could produce in the order preferred by upstream. When
called on sinkpads <em class="parameter"><code>filter</code></em>
 contains the caps accepted by
downstream in the preferred order. <em class="parameter"><code>filter</code></em>
 might be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> but
if it is not <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> the returned caps will be a subset of <em class="parameter"><code>filter</code></em>
.</p>
<div class="refsect3">
<a name="gst-pad-peer-query-caps.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a  <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to get the capabilities of.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>filter</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstCaps.html" title="GstCaps"><span class="type">GstCaps</span></a> filter, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-peer-query-caps.returns"></a><h4>Returns</h4>
<p>the caps of the peer pad with incremented
ref-count. When there is no peer pad, this function returns <em class="parameter"><code>filter</code></em>
or,
when <em class="parameter"><code>filter</code></em>
is <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>, ANY caps. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-set-query-function"></a><h3>gst_pad_set_query_function()</h3>
<pre class="programlisting">#define gst_pad_set_query_function(p,f)   gst_pad_set_query_function_full((p),(f),NULL,NULL)
</pre>
<p>Calls <a class="link" href="GstPad.html#gst-pad-set-query-function-full" title="gst_pad_set_query_function_full ()"><code class="function">gst_pad_set_query_function_full()</code></a> with <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> for the user_data and
notify.</p>
<div class="refsect3">
<a name="gst-pad-set-query-function.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>p</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> of either direction.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>f</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html#GstPadQueryFunction" title="GstPadQueryFunction ()"><span class="type">GstPadQueryFunction</span></a> to set.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-set-query-function-full"></a><h3>gst_pad_set_query_function_full ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_pad_set_query_function_full (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                                 <em class="parameter"><code><a class="link" href="GstPad.html#GstPadQueryFunction" title="GstPadQueryFunction ()"><span class="type">GstPadQueryFunction</span></a> query</code></em>,
                                 <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>,
                                 <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> notify</code></em>);</pre>
<p>Set the given query function for the pad.</p>
<div class="refsect3">
<a name="gst-pad-set-query-function-full.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> of either direction.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>query</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html#GstPadQueryFunction" title="GstPadQueryFunction ()"><span class="type">GstPadQueryFunction</span></a> to set.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user_data passed to <em class="parameter"><code>notify</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>notify</p></td>
<td class="parameter_description"><p>notify called when <em class="parameter"><code>query</code></em>
will not be used anymore.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GstPadQueryFunction"></a><h3>GstPadQueryFunction ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
<span class="c_punctuation">(</span>*GstPadQueryFunction<span class="c_punctuation">)</span> (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                        <em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *parent</code></em>,
                        <em class="parameter"><code><a class="link" href="GstQuery.html" title="GstQuery"><span class="type">GstQuery</span></a> *query</code></em>);</pre>
<p>The signature of the query function.</p>
<div class="refsect3">
<a name="GstPadQueryFunction.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to query.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>parent</p></td>
<td class="parameter_description"><p>the parent of <em class="parameter"><code>pad</code></em>
. If the <a class="link" href="GstPad.html#GST-PAD-FLAG-NEED-PARENT:CAPS"><span class="type">GST_PAD_FLAG_NEED_PARENT</span></a>
flag is set, <em class="parameter"><code>parent</code></em>
is guaranteed to be not-<a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> and remain valid
during the execution of this function. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>query</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstQuery.html" title="GstQuery"><span class="type">GstQuery</span></a> object to execute</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="GstPadQueryFunction.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the query could be performed.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-set-iterate-internal-links-function"></a><h3>gst_pad_set_iterate_internal_links_function()</h3>
<pre class="programlisting">#define gst_pad_set_iterate_internal_links_function(p,f) gst_pad_set_iterate_internal_links_function_full((p),(f),NULL,NULL)
</pre>
<p>Calls <a class="link" href="GstPad.html#gst-pad-set-iterate-internal-links-function-full" title="gst_pad_set_iterate_internal_links_function_full ()"><code class="function">gst_pad_set_iterate_internal_links_function_full()</code></a> with <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>
for the user_data and notify.</p>
<div class="refsect3">
<a name="gst-pad-set-iterate-internal-links-function.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>p</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> of either direction.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>f</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html#GstPadIterIntLinkFunction" title="GstPadIterIntLinkFunction ()"><span class="type">GstPadIterIntLinkFunction</span></a> to set.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-set-iterate-internal-links-function-full"></a><h3>gst_pad_set_iterate_internal_links_function_full ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_pad_set_iterate_internal_links_function_full
                               (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                                <em class="parameter"><code><a class="link" href="GstPad.html#GstPadIterIntLinkFunction" title="GstPadIterIntLinkFunction ()"><span class="type">GstPadIterIntLinkFunction</span></a> iterintlink</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> notify</code></em>);</pre>
<p>Sets the given internal link iterator function for the pad.</p>
<div class="refsect3">
<a name="gst-pad-set-iterate-internal-links-function-full.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> of either direction.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>iterintlink</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html#GstPadIterIntLinkFunction" title="GstPadIterIntLinkFunction ()"><span class="type">GstPadIterIntLinkFunction</span></a> to set.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user_data passed to <em class="parameter"><code>notify</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>notify</p></td>
<td class="parameter_description"><p>notify called when <em class="parameter"><code>iterintlink</code></em>
will not be used anymore.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GstPadIterIntLinkFunction"></a><h3>GstPadIterIntLinkFunction ()</h3>
<pre class="programlisting"><a class="link" href="gstreamer-GstIterator.html#GstIterator" title="struct GstIterator"><span class="returnvalue">GstIterator</span></a> *
<span class="c_punctuation">(</span>*GstPadIterIntLinkFunction<span class="c_punctuation">)</span> (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                              <em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *parent</code></em>);</pre>
<p>The signature of the internal pad link iterator function.</p>
<div class="refsect3">
<a name="GstPadIterIntLinkFunction.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>The <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to query.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>parent</p></td>
<td class="parameter_description"><p>the parent of <em class="parameter"><code>pad</code></em>
. If the <a class="link" href="GstPad.html#GST-PAD-FLAG-NEED-PARENT:CAPS"><span class="type">GST_PAD_FLAG_NEED_PARENT</span></a>
flag is set, <em class="parameter"><code>parent</code></em>
is guaranteed to be not-<a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> and remain valid
during the execution of this function. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="GstPadIterIntLinkFunction.returns"></a><h4>Returns</h4>
<p> a new <a class="link" href="gstreamer-GstIterator.html#GstIterator" title="struct GstIterator"><span class="type">GstIterator</span></a> that will iterate over all pads that are
linked to the given pad on the inside of the parent element.</p>
<p>the caller must call <a class="link" href="gstreamer-GstIterator.html#gst-iterator-free" title="gst_iterator_free ()"><code class="function">gst_iterator_free()</code></a> after usage.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-iterate-internal-links"></a><h3>gst_pad_iterate_internal_links ()</h3>
<pre class="programlisting"><a class="link" href="gstreamer-GstIterator.html#GstIterator" title="struct GstIterator"><span class="returnvalue">GstIterator</span></a> *
gst_pad_iterate_internal_links (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>);</pre>
<p>Gets an iterator for the pads to which the given pad is linked to inside
of the parent element.</p>
<p>Each <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> element yielded by the iterator will have its refcount increased,
so unref after use.</p>
<p>Free-function: gst_iterator_free</p>
<div class="refsect3">
<a name="gst-pad-iterate-internal-links.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the GstPad to get the internal links of.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-iterate-internal-links.returns"></a><h4>Returns</h4>
<p>a new <a class="link" href="gstreamer-GstIterator.html#GstIterator" title="struct GstIterator"><span class="type">GstIterator</span></a> of <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>
or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> when the pad does not have an iterator function
configured. Use <a class="link" href="gstreamer-GstIterator.html#gst-iterator-free" title="gst_iterator_free ()"><code class="function">gst_iterator_free()</code></a> after usage. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-iterate-internal-links-default"></a><h3>gst_pad_iterate_internal_links_default ()</h3>
<pre class="programlisting"><a class="link" href="gstreamer-GstIterator.html#GstIterator" title="struct GstIterator"><span class="returnvalue">GstIterator</span></a> *
gst_pad_iterate_internal_links_default
                               (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                                <em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *parent</code></em>);</pre>
<p>Iterate the list of pads to which the given pad is linked to inside of
the parent element.
This is the default handler, and thus returns an iterator of all of the
pads inside the parent element with opposite direction.</p>
<p>The caller must free this iterator after use with <a class="link" href="gstreamer-GstIterator.html#gst-iterator-free" title="gst_iterator_free ()"><code class="function">gst_iterator_free()</code></a>.</p>
<div class="refsect3">
<a name="gst-pad-iterate-internal-links-default.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to get the internal links of.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>parent</p></td>
<td class="parameter_description"><p>the parent of <em class="parameter"><code>pad</code></em>
or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-iterate-internal-links-default.returns"></a><h4>Returns</h4>
<p>a <a class="link" href="gstreamer-GstIterator.html#GstIterator" title="struct GstIterator"><span class="type">GstIterator</span></a> of <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if <em class="parameter"><code>pad</code></em>
has no parent. Unref each returned pad with <a class="link" href="GstObject.html#gst-object-unref" title="gst_object_unref ()"><code class="function">gst_object_unref()</code></a>. </p>
<p><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-set-element-private"></a><h3>gst_pad_set_element_private ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_pad_set_element_private (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                             <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> priv</code></em>);</pre>
<p>Set the given private data gpointer on the pad.
This function can only be used by the element that owns the pad.
No locking is performed in this function.</p>
<div class="refsect3">
<a name="gst-pad-set-element-private.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to set the private data of.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>priv</p></td>
<td class="parameter_description"><p>The private data to attach to the pad.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-get-element-private"></a><h3>gst_pad_get_element_private ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="returnvalue">gpointer</span></a>
gst_pad_get_element_private (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>);</pre>
<p>Gets the private data of a pad.
No locking is performed in this function.</p>
<div class="refsect3">
<a name="gst-pad-get-element-private.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to get the private data of.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-get-element-private.returns"></a><h4>Returns</h4>
<p>a <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> to the private data. </p>
<p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-create-stream-id"></a><h3>gst_pad_create_stream_id ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
gst_pad_create_stream_id (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                          <em class="parameter"><code><a class="link" href="GstElement.html" title="GstElement"><span class="type">GstElement</span></a> *parent</code></em>,
                          <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *stream_id</code></em>);</pre>
<p>Creates a stream-id for the source <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> <em class="parameter"><code>pad</code></em>
 by combining the
upstream information with the optional <em class="parameter"><code>stream_id</code></em>
 of the stream
of <em class="parameter"><code>pad</code></em>
. <em class="parameter"><code>pad</code></em>
 must have a parent <a class="link" href="GstElement.html" title="GstElement"><span class="type">GstElement</span></a> and which must have zero
or one sinkpad. <em class="parameter"><code>stream_id</code></em>
 can only be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if the parent element
of <em class="parameter"><code>pad</code></em>
 has only a single source pad.</p>
<p>This function generates an unique stream-id by getting the upstream
stream-start event stream ID and appending <em class="parameter"><code>stream_id</code></em>
 to it. If the
element has no sinkpad it will generate an upstream stream-id by
doing an URI query on the element and in the worst case just uses
a random number. Source elements that don't implement the URI
handler interface should ideally generate a unique, deterministic
stream-id manually instead.</p>
<p>Since stream IDs are sorted alphabetically, any numbers in the
stream ID should be printed with a fixed number of characters,
preceded by 0's, such as by using the format %03u instead of %u.</p>
<div class="refsect3">
<a name="gst-pad-create-stream-id.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>A source <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>parent</p></td>
<td class="parameter_description"><p>Parent <a class="link" href="GstElement.html" title="GstElement"><span class="type">GstElement</span></a> of <em class="parameter"><code>pad</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>stream_id</p></td>
<td class="parameter_description"><p>The stream-id. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-create-stream-id.returns"></a><h4>Returns</h4>
<p> A stream-id for <em class="parameter"><code>pad</code></em>
. <a href="/usr/share/gtk-doc/html/glib/glib-Memory-Allocation.html#g-free"><code class="function">g_free()</code></a> after usage.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-create-stream-id-printf"></a><h3>gst_pad_create_stream_id_printf ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
gst_pad_create_stream_id_printf (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                                 <em class="parameter"><code><a class="link" href="GstElement.html" title="GstElement"><span class="type">GstElement</span></a> *parent</code></em>,
                                 <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *stream_id</code></em>,
                                 <em class="parameter"><code>...</code></em>);</pre>
<p>Creates a stream-id for the source <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> <em class="parameter"><code>pad</code></em>
 by combining the
upstream information with the optional <em class="parameter"><code>stream_id</code></em>
 of the stream
of <em class="parameter"><code>pad</code></em>
. <em class="parameter"><code>pad</code></em>
 must have a parent <a class="link" href="GstElement.html" title="GstElement"><span class="type">GstElement</span></a> and which must have zero
or one sinkpad. <em class="parameter"><code>stream_id</code></em>
 can only be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if the parent element
of <em class="parameter"><code>pad</code></em>
 has only a single source pad.</p>
<p>This function generates an unique stream-id by getting the upstream
stream-start event stream ID and appending <em class="parameter"><code>stream_id</code></em>
 to it. If the
element has no sinkpad it will generate an upstream stream-id by
doing an URI query on the element and in the worst case just uses
a random number. Source elements that don't implement the URI
handler interface should ideally generate a unique, deterministic
stream-id manually instead.</p>
<div class="refsect3">
<a name="gst-pad-create-stream-id-printf.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>A source <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>parent</p></td>
<td class="parameter_description"><p>Parent <a class="link" href="GstElement.html" title="GstElement"><span class="type">GstElement</span></a> of <em class="parameter"><code>pad</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>stream_id</p></td>
<td class="parameter_description"><p>The stream-id. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>...</p></td>
<td class="parameter_description"><p>parameters for the <em class="parameter"><code>stream_id</code></em>
format string</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-create-stream-id-printf.returns"></a><h4>Returns</h4>
<p> A stream-id for <em class="parameter"><code>pad</code></em>
. <a href="/usr/share/gtk-doc/html/glib/glib-Memory-Allocation.html#g-free"><code class="function">g_free()</code></a> after usage.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-create-stream-id-printf-valist"></a><h3>gst_pad_create_stream_id_printf_valist ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
gst_pad_create_stream_id_printf_valist
                               (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                                <em class="parameter"><code><a class="link" href="GstElement.html" title="GstElement"><span class="type">GstElement</span></a> *parent</code></em>,
                                <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *stream_id</code></em>,
                                <em class="parameter"><code><span class="type">va_list</span> var_args</code></em>);</pre>
<p>Creates a stream-id for the source <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> <em class="parameter"><code>pad</code></em>
 by combining the
upstream information with the optional <em class="parameter"><code>stream_id</code></em>
 of the stream
of <em class="parameter"><code>pad</code></em>
. <em class="parameter"><code>pad</code></em>
 must have a parent <a class="link" href="GstElement.html" title="GstElement"><span class="type">GstElement</span></a> and which must have zero
or one sinkpad. <em class="parameter"><code>stream_id</code></em>
 can only be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if the parent element
of <em class="parameter"><code>pad</code></em>
 has only a single source pad.</p>
<p>This function generates an unique stream-id by getting the upstream
stream-start event stream ID and appending <em class="parameter"><code>stream_id</code></em>
 to it. If the
element has no sinkpad it will generate an upstream stream-id by
doing an URI query on the element and in the worst case just uses
a random number. Source elements that don't implement the URI
handler interface should ideally generate a unique, deterministic
stream-id manually instead.</p>
<div class="refsect3">
<a name="gst-pad-create-stream-id-printf-valist.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>A source <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>parent</p></td>
<td class="parameter_description"><p>Parent <a class="link" href="GstElement.html" title="GstElement"><span class="type">GstElement</span></a> of <em class="parameter"><code>pad</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>stream_id</p></td>
<td class="parameter_description"><p>The stream-id. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>var_args</p></td>
<td class="parameter_description"><p>parameters for the <em class="parameter"><code>stream_id</code></em>
format string</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-create-stream-id-printf-valist.returns"></a><h4>Returns</h4>
<p> A stream-id for <em class="parameter"><code>pad</code></em>
. <a href="/usr/share/gtk-doc/html/glib/glib-Memory-Allocation.html#g-free"><code class="function">g_free()</code></a> after usage.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-get-stream-id"></a><h3>gst_pad_get_stream_id ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
gst_pad_get_stream_id (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>);</pre>
<p>Returns the current stream-id for the <em class="parameter"><code>pad</code></em>
, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if none has been
set yet, i.e. the pad has not received a stream-start event yet.</p>
<p>This is a convenience wrapper around <a class="link" href="GstPad.html#gst-pad-get-sticky-event" title="gst_pad_get_sticky_event ()"><code class="function">gst_pad_get_sticky_event()</code></a> and
<a class="link" href="GstEvent.html#gst-event-parse-stream-start" title="gst_event_parse_stream_start ()"><code class="function">gst_event_parse_stream_start()</code></a>.</p>
<p>The returned stream-id string should be treated as an opaque string, its
contents should not be interpreted.</p>
<div class="refsect3">
<a name="gst-pad-get-stream-id.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>A source <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-get-stream-id.returns"></a><h4>Returns</h4>
<p>a newly-allocated copy of the stream-id for
<em class="parameter"><code>pad</code></em>
, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.  <a href="/usr/share/gtk-doc/html/glib/glib-Memory-Allocation.html#g-free"><code class="function">g_free()</code></a> the returned string when no longer
needed. </p>
<p><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="ix10.html#api-index-1.2">1.2</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-get-stream"></a><h3>gst_pad_get_stream ()</h3>
<pre class="programlisting"><a class="link" href="gstreamer-GstStream.html#GstStream" title="struct GstStream"><span class="returnvalue">GstStream</span></a> *
gst_pad_get_stream (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>);</pre>
<p>Returns the current <a class="link" href="gstreamer-GstStream.html#GstStream" title="struct GstStream"><span class="type">GstStream</span></a> for the <em class="parameter"><code>pad</code></em>
, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if none has been
set yet, i.e. the pad has not received a stream-start event yet.</p>
<p>This is a convenience wrapper around <a class="link" href="GstPad.html#gst-pad-get-sticky-event" title="gst_pad_get_sticky_event ()"><code class="function">gst_pad_get_sticky_event()</code></a> and
<a class="link" href="GstEvent.html#gst-event-parse-stream" title="gst_event_parse_stream ()"><code class="function">gst_event_parse_stream()</code></a>.</p>
<div class="refsect3">
<a name="gst-pad-get-stream.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>A source <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-get-stream.returns"></a><h4>Returns</h4>
<p>the current <a class="link" href="gstreamer-GstStream.html#GstStream" title="struct GstStream"><span class="type">GstStream</span></a> for <em class="parameter"><code>pad</code></em>
, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.
unref the returned stream when no longer needed. </p>
<p><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="ix05.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="GstPadForwardFunction"></a><h3>GstPadForwardFunction ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
<span class="c_punctuation">(</span>*GstPadForwardFunction<span class="c_punctuation">)</span> (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                          <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre>
<p>A forward function is called for all internally linked pads, see
<a class="link" href="GstPad.html#gst-pad-forward" title="gst_pad_forward ()"><code class="function">gst_pad_forward()</code></a>.</p>
<div class="refsect3">
<a name="GstPadForwardFunction.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> that is forwarded.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>the gpointer to optional user data.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="GstPadForwardFunction.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the dispatching procedure has to be stopped.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-forward"></a><h3>gst_pad_forward ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_forward (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                 <em class="parameter"><code><a class="link" href="GstPad.html#GstPadForwardFunction" title="GstPadForwardFunction ()"><span class="type">GstPadForwardFunction</span></a> forward</code></em>,
                 <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre>
<p>Calls <em class="parameter"><code>forward</code></em>
 for all internally linked pads of <em class="parameter"><code>pad</code></em>
. This function deals with
dynamically changing internal pads and will make sure that the <em class="parameter"><code>forward</code></em>

function is only called once for each pad.</p>
<p>When <em class="parameter"><code>forward</code></em>
 returns <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a>, no further pads will be processed.</p>
<div class="refsect3">
<a name="gst-pad-forward.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>forward</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html#GstPadForwardFunction" title="GstPadForwardFunction ()"><span class="type">GstPadForwardFunction</span></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="The callback is valid only during the call to the method."><span class="acronym">scope call</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user data passed to <em class="parameter"><code>forward</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-forward.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if one of the dispatcher functions returned <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a>.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-chain"></a><h3>gst_pad_chain ()</h3>
<pre class="programlisting"><a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a>
gst_pad_chain (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
               <em class="parameter"><code><a class="link" href="GstBuffer.html" title="GstBuffer"><span class="type">GstBuffer</span></a> *buffer</code></em>);</pre>
<p>Chain a buffer to <em class="parameter"><code>pad</code></em>
.</p>
<p>The function returns <a class="link" href="GstPad.html#GST-FLOW-FLUSHING:CAPS"><span class="type">GST_FLOW_FLUSHING</span></a> if the pad was flushing.</p>
<p>If the buffer type is not acceptable for <em class="parameter"><code>pad</code></em>
 (as negotiated with a
preceding GST_EVENT_CAPS event), this function returns
<a class="link" href="GstPad.html#GST-FLOW-NOT-NEGOTIATED:CAPS"><span class="type">GST_FLOW_NOT_NEGOTIATED</span></a>.</p>
<p>The function proceeds calling the chain function installed on <em class="parameter"><code>pad</code></em>
 (see
<a class="link" href="GstPad.html#gst-pad-set-chain-function" title="gst_pad_set_chain_function()"><code class="function">gst_pad_set_chain_function()</code></a>) and the return value of that function is
returned to the caller. <a class="link" href="GstPad.html#GST-FLOW-NOT-SUPPORTED:CAPS"><span class="type">GST_FLOW_NOT_SUPPORTED</span></a> is returned if <em class="parameter"><code>pad</code></em>
 has no
chain function.</p>
<p>In all cases, success or failure, the caller loses its reference to <em class="parameter"><code>buffer</code></em>

after calling this function.</p>
<div class="refsect3">
<a name="gst-pad-chain.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a sink <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>, returns GST_FLOW_ERROR if not.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>buffer</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstBuffer.html" title="GstBuffer"><span class="type">GstBuffer</span></a> to send, return GST_FLOW_ERROR
if not. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-chain.returns"></a><h4>Returns</h4>
<p> a <a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="type">GstFlowReturn</span></a> from the pad.</p>
<p>MT safe.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-chain-list"></a><h3>gst_pad_chain_list ()</h3>
<pre class="programlisting"><a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a>
gst_pad_chain_list (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                    <em class="parameter"><code><a class="link" href="GstBufferList.html" title="GstBufferList"><span class="type">GstBufferList</span></a> *list</code></em>);</pre>
<p>Chain a bufferlist to <em class="parameter"><code>pad</code></em>
.</p>
<p>The function returns <a class="link" href="GstPad.html#GST-FLOW-FLUSHING:CAPS"><span class="type">GST_FLOW_FLUSHING</span></a> if the pad was flushing.</p>
<p>If <em class="parameter"><code>pad</code></em>
 was not negotiated properly with a CAPS event, this function
returns <a class="link" href="GstPad.html#GST-FLOW-NOT-NEGOTIATED:CAPS"><span class="type">GST_FLOW_NOT_NEGOTIATED</span></a>.</p>
<p>The function proceeds calling the chainlist function installed on <em class="parameter"><code>pad</code></em>
 (see
<a class="link" href="GstPad.html#gst-pad-set-chain-list-function" title="gst_pad_set_chain_list_function()"><code class="function">gst_pad_set_chain_list_function()</code></a>) and the return value of that function is
returned to the caller. <a class="link" href="GstPad.html#GST-FLOW-NOT-SUPPORTED:CAPS"><span class="type">GST_FLOW_NOT_SUPPORTED</span></a> is returned if <em class="parameter"><code>pad</code></em>
 has no
chainlist function.</p>
<p>In all cases, success or failure, the caller loses its reference to <em class="parameter"><code>list</code></em>

after calling this function.</p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-pad-chain-list.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a sink <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>, returns GST_FLOW_ERROR if not.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>list</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstBufferList.html" title="GstBufferList"><span class="type">GstBufferList</span></a> to send, return GST_FLOW_ERROR
if not. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-chain-list.returns"></a><h4>Returns</h4>
<p> a <a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="type">GstFlowReturn</span></a> from the pad.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-start-task"></a><h3>gst_pad_start_task ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_start_task (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                    <em class="parameter"><code><a class="link" href="GstTask.html#GstTaskFunction" title="GstTaskFunction ()"><span class="type">GstTaskFunction</span></a> func</code></em>,
                    <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>,
                    <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> notify</code></em>);</pre>
<p>Starts a task that repeatedly calls <em class="parameter"><code>func</code></em>
 with <em class="parameter"><code>user_data</code></em>
. This function
is mostly used in pad activation functions to start the dataflow.
The <a class="link" href="GstPad.html#GST-PAD-STREAM-LOCK:CAPS" title="GST_PAD_STREAM_LOCK()"><span class="type">GST_PAD_STREAM_LOCK</span></a> of <em class="parameter"><code>pad</code></em>
 will automatically be acquired
before <em class="parameter"><code>func</code></em>
 is called.</p>
<div class="refsect3">
<a name="gst-pad-start-task.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to start the task of</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>func</p></td>
<td class="parameter_description"><p>the task function to call</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user data passed to the task function</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>notify</p></td>
<td class="parameter_description"><p>called when <em class="parameter"><code>user_data</code></em>
is no longer referenced</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-start-task.returns"></a><h4>Returns</h4>
<p> a <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the task could be started.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-pause-task"></a><h3>gst_pad_pause_task ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_pause_task (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>);</pre>
<p>Pause the task of <em class="parameter"><code>pad</code></em>
. This function will also wait until the
function executed by the task is finished if this function is not
called from the task function.</p>
<div class="refsect3">
<a name="gst-pad-pause-task.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to pause the task of</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-pause-task.returns"></a><h4>Returns</h4>
<p> a <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the task could be paused or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> when the pad
has no task.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-stop-task"></a><h3>gst_pad_stop_task ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_stop_task (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>);</pre>
<p>Stop the task of <em class="parameter"><code>pad</code></em>
. This function will also make sure that the
function executed by the task will effectively stop if not called
from the GstTaskFunction.</p>
<p>This function will deadlock if called from the GstTaskFunction of
the task. Use <a class="link" href="GstTask.html#gst-task-pause" title="gst_task_pause ()"><code class="function">gst_task_pause()</code></a> instead.</p>
<p>Regardless of whether the pad has a task, the stream lock is acquired and
released so as to ensure that streaming through this pad has finished.</p>
<div class="refsect3">
<a name="gst-pad-stop-task.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to stop the task of</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-stop-task.returns"></a><h4>Returns</h4>
<p> a <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the task could be stopped or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> on error.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-get-task-state"></a><h3>gst_pad_get_task_state ()</h3>
<pre class="programlisting"><a class="link" href="GstTask.html#GstTaskState" title="enum GstTaskState"><span class="returnvalue">GstTaskState</span></a>
gst_pad_get_task_state (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>);</pre>
<p>Get <em class="parameter"><code>pad</code></em>
 task state. If no task is currently
set, <a class="link" href="GstTask.html#GST-TASK-STOPPED:CAPS"><span class="type">GST_TASK_STOPPED</span></a> is returned.</p>
<div class="refsect3">
<a name="gst-pad-get-task-state.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to get task state from</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-get-task-state.returns"></a><h4>Returns</h4>
<p> The current state of <em class="parameter"><code>pad</code></em>
's task.</p>
</div>
<p class="since">Since: <a class="link" href="ix04.html#api-index-1.12">1.12</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-pad-set-active"></a><h3>gst_pad_set_active ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_pad_set_active (<em class="parameter"><code><a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> *pad</code></em>,
                    <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> active</code></em>);</pre>
<p>Activates or deactivates the given pad.
Normally called from within core state change functions.</p>
<p>If <em class="parameter"><code>active</code></em>
, makes sure the pad is active. If it is already active, either in
push or pull mode, just return. Otherwise dispatches to the pad's activate
function to perform the actual activation.</p>
<p>If not <em class="parameter"><code>active</code></em>
, calls <a class="link" href="GstPad.html#gst-pad-activate-mode" title="gst_pad_activate_mode ()"><code class="function">gst_pad_activate_mode()</code></a> with the pad's current mode
and a <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> argument.</p>
<div class="refsect3">
<a name="gst-pad-set-active.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> to activate or deactivate.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>active</p></td>
<td class="parameter_description"><p>whether or not the pad should be active.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-pad-set-active.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the operation was successful.</p>
<p>MT safe.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-GET-STREAM-LOCK:CAPS"></a><h3>GST_PAD_GET_STREAM_LOCK()</h3>
<pre class="programlisting">#define GST_PAD_GET_STREAM_LOCK(pad)    (&amp;(GST_PAD_CAST(pad)-&gt;stream_rec_lock))
</pre>
<p>Get the stream lock of <em class="parameter"><code>pad</code></em>
. The stream lock is protecting the
resources used in the data processing functions of <em class="parameter"><code>pad</code></em>
. Accessor
macro, use <a class="link" href="GstPad.html#GST-PAD-STREAM-LOCK:CAPS" title="GST_PAD_STREAM_LOCK()"><code class="function">GST_PAD_STREAM_LOCK()</code></a> and <a class="link" href="GstPad.html#GST-PAD-STREAM-UNLOCK:CAPS" title="GST_PAD_STREAM_UNLOCK()"><code class="function">GST_PAD_STREAM_UNLOCK()</code></a> instead
to take/release the pad's stream lock.</p>
<div class="refsect3">
<a name="GST-PAD-GET-STREAM-LOCK.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-STREAM-LOCK:CAPS"></a><h3>GST_PAD_STREAM_LOCK()</h3>
<pre class="programlisting">#define GST_PAD_STREAM_LOCK(pad)        g_rec_mutex_lock(GST_PAD_GET_STREAM_LOCK(pad))
</pre>
<p>Take the pad's stream lock. The stream lock is recursive and will be taken
when buffers or serialized downstream events are pushed on a pad.</p>
<div class="refsect3">
<a name="GST-PAD-STREAM-LOCK.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-STREAM-TRYLOCK:CAPS"></a><h3>GST_PAD_STREAM_TRYLOCK()</h3>
<pre class="programlisting">#define GST_PAD_STREAM_TRYLOCK(pad)     g_rec_mutex_trylock(GST_PAD_GET_STREAM_LOCK(pad))
</pre>
<p>Try to take the pad's stream lock, and return <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the lock could be
taken, and otherwise <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>.</p>
<div class="refsect3">
<a name="GST-PAD-STREAM-TRYLOCK.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-STREAM-UNLOCK:CAPS"></a><h3>GST_PAD_STREAM_UNLOCK()</h3>
<pre class="programlisting">#define GST_PAD_STREAM_UNLOCK(pad)      g_rec_mutex_unlock(GST_PAD_GET_STREAM_LOCK(pad))
</pre>
<p>Release the pad's stream lock.</p>
<div class="refsect3">
<a name="GST-PAD-STREAM-UNLOCK.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-NAME:CAPS"></a><h3>GST_PAD_NAME()</h3>
<pre class="programlisting">#define GST_PAD_NAME(pad)		(GST_OBJECT_NAME(pad))
</pre>
<p>Get name of the given pad.
No locking is performed in this function, use <a class="link" href="GstPad.html#gst-pad-get-name" title="gst_pad_get_name()"><code class="function">gst_pad_get_name()</code></a> instead.</p>
<div class="refsect3">
<a name="GST-PAD-NAME.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-PARENT:CAPS"></a><h3>GST_PAD_PARENT()</h3>
<pre class="programlisting">#define GST_PAD_PARENT(pad)		(GST_ELEMENT_CAST(GST_OBJECT_PARENT(pad)))
</pre>
<p>Get the <em class="parameter"><code>pad</code></em>
 parent.
No locking is performed in this function, use <a class="link" href="GstPad.html#gst-pad-get-parent" title="gst_pad_get_parent()"><code class="function">gst_pad_get_parent()</code></a> instead.</p>
<div class="refsect3">
<a name="GST-PAD-PARENT.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-ELEMENT-PRIVATE:CAPS"></a><h3>GST_PAD_ELEMENT_PRIVATE()</h3>
<pre class="programlisting">#define GST_PAD_ELEMENT_PRIVATE(pad)    (GST_PAD_CAST(pad)-&gt;element_private)
</pre>
<p>Get the private data of <em class="parameter"><code>pad</code></em>
, which is usually some pad- or stream-specific
structure created by the element and set on the pad when creating it.
No locking is performed in this function.</p>
<div class="refsect3">
<a name="GST-PAD-ELEMENT-PRIVATE.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-PAD-TEMPLATE:CAPS"></a><h3>GST_PAD_PAD_TEMPLATE()</h3>
<pre class="programlisting">#define GST_PAD_PAD_TEMPLATE(pad) (GST_PAD_CAST(pad)-&gt;padtemplate)
</pre>
<p>Get the <em class="parameter"><code>pad</code></em>
 <a class="link" href="GstPadTemplate.html" title="GstPadTemplate"><span class="type">GstPadTemplate</span></a>. It describes the possible media types
a <em class="parameter"><code>pad</code></em>
 or an element factory can handle.</p>
<div class="refsect3">
<a name="GST-PAD-PAD-TEMPLATE.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-DIRECTION:CAPS"></a><h3>GST_PAD_DIRECTION()</h3>
<pre class="programlisting">#define GST_PAD_DIRECTION(pad)		(GST_PAD_CAST(pad)-&gt;direction)
</pre>
<p>Get the <a class="link" href="GstPad.html#GstPadDirection" title="enum GstPadDirection"><span class="type">GstPadDirection</span></a> of the given <em class="parameter"><code>pad</code></em>
. Accessor macro, use
<a class="link" href="GstPad.html#gst-pad-get-direction" title="gst_pad_get_direction ()"><code class="function">gst_pad_get_direction()</code></a> instead.</p>
<div class="refsect3">
<a name="GST-PAD-DIRECTION.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-LAST-FLOW-RETURN:CAPS"></a><h3>GST_PAD_LAST_FLOW_RETURN()</h3>
<pre class="programlisting">#define GST_PAD_LAST_FLOW_RETURN(pad)   (GST_PAD_CAST(pad)-&gt;ABI.abi.last_flowret)
</pre>
<p>Gets the last flow return on this pad</p>
<div class="refsect3">
<a name="GST-PAD-LAST-FLOW-RETURN.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix08.html#api-index-1.4">1.4</a></p>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-TASK:CAPS"></a><h3>GST_PAD_TASK()</h3>
<pre class="programlisting">#define GST_PAD_TASK(pad)		(GST_PAD_CAST(pad)-&gt;task)
</pre>
<p>Get the <a class="link" href="GstTask.html" title="GstTask"><span class="type">GstTask</span></a> of <em class="parameter"><code>pad</code></em>
. Accessor macro used by GStreamer. Use the
<a class="link" href="GstPad.html#gst-pad-start-task" title="gst_pad_start_task ()"><code class="function">gst_pad_start_task()</code></a>, <a class="link" href="GstPad.html#gst-pad-stop-task" title="gst_pad_stop_task ()"><code class="function">gst_pad_stop_task()</code></a> and <a class="link" href="GstPad.html#gst-pad-pause-task" title="gst_pad_pause_task ()"><code class="function">gst_pad_pause_task()</code></a>
functions instead.</p>
<div class="refsect3">
<a name="GST-PAD-TASK.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-MODE:CAPS"></a><h3>GST_PAD_MODE()</h3>
<pre class="programlisting">#define GST_PAD_MODE(pad)	        (GST_PAD_CAST(pad)-&gt;mode)
</pre>
<p>Get the <a class="link" href="GstPad.html#GstPadMode" title="enum GstPadMode"><span class="type">GstPadMode</span></a> of pad, which will be GST_PAD_MODE_NONE if the pad
has not been activated yet, and otherwise either GST_PAD_MODE_PUSH or
GST_PAD_MODE_PULL depending on which mode the pad was activated in.</p>
<div class="refsect3">
<a name="GST-PAD-MODE.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-ACTIVATEFUNC:CAPS"></a><h3>GST_PAD_ACTIVATEFUNC()</h3>
<pre class="programlisting">#define GST_PAD_ACTIVATEFUNC(pad) (GST_PAD_CAST(pad)-&gt;activatefunc)
</pre>
<p>Get the <a class="link" href="GstPad.html#GstPadActivateFunction" title="GstPadActivateFunction ()"><span class="type">GstPadActivateFunction</span></a> from <em class="parameter"><code>pad</code></em>
.</p>
<div class="refsect3">
<a name="GST-PAD-ACTIVATEFUNC.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-ACTIVATEMODEFUNC:CAPS"></a><h3>GST_PAD_ACTIVATEMODEFUNC()</h3>
<pre class="programlisting">#define GST_PAD_ACTIVATEMODEFUNC(pad) (GST_PAD_CAST(pad)-&gt;activatemodefunc)
</pre>
<p>Get the <a class="link" href="GstPad.html#GstPadActivateModeFunction" title="GstPadActivateModeFunction ()"><span class="type">GstPadActivateModeFunction</span></a> from the given <em class="parameter"><code>pad</code></em>
.</p>
<div class="refsect3">
<a name="GST-PAD-ACTIVATEMODEFUNC.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-CHAINFUNC:CAPS"></a><h3>GST_PAD_CHAINFUNC()</h3>
<pre class="programlisting">#define GST_PAD_CHAINFUNC(pad)		(GST_PAD_CAST(pad)-&gt;chainfunc)
</pre>
<p>Get the <a class="link" href="GstPad.html#GstPadChainFunction" title="GstPadChainFunction ()"><span class="type">GstPadChainFunction</span></a> from the given <em class="parameter"><code>pad</code></em>
.</p>
<div class="refsect3">
<a name="GST-PAD-CHAINFUNC.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-CHAINLISTFUNC:CAPS"></a><h3>GST_PAD_CHAINLISTFUNC()</h3>
<pre class="programlisting">#define GST_PAD_CHAINLISTFUNC(pad)      (GST_PAD_CAST(pad)-&gt;chainlistfunc)
</pre>
<p>Get the <a class="link" href="GstPad.html#GstPadChainListFunction" title="GstPadChainListFunction ()"><span class="type">GstPadChainListFunction</span></a> from the given <em class="parameter"><code>pad</code></em>
.</p>
<div class="refsect3">
<a name="GST-PAD-CHAINLISTFUNC.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-EVENTFUNC:CAPS"></a><h3>GST_PAD_EVENTFUNC()</h3>
<pre class="programlisting">#define GST_PAD_EVENTFUNC(pad)		(GST_PAD_CAST(pad)-&gt;eventfunc)
</pre>
<p>Get the <a class="link" href="GstPad.html#GstPadEventFunction" title="GstPadEventFunction ()"><span class="type">GstPadEventFunction</span></a> from the given <em class="parameter"><code>pad</code></em>
, which
is the function that handles events on the pad. You can
use this to set your own event handling function on a pad
after you create it.  If your element derives from a base
class, use the base class's virtual functions instead.</p>
<div class="refsect3">
<a name="GST-PAD-EVENTFUNC.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-EVENTFULLFUNC:CAPS"></a><h3>GST_PAD_EVENTFULLFUNC()</h3>
<pre class="programlisting">#define GST_PAD_EVENTFULLFUNC(pad) (GST_PAD_CAST(pad)-&gt;ABI.abi.eventfullfunc)
</pre>
<p>Get the <a class="link" href="GstPad.html#GstPadEventFullFunction" title="GstPadEventFullFunction ()"><span class="type">GstPadEventFullFunction</span></a> from the given <em class="parameter"><code>pad</code></em>
, which
is the function that handles events on the pad. You can
use this to set your own event handling function on a pad
after you create it.  If your element derives from a base
class, use the base class's virtual functions instead.</p>
<div class="refsect3">
<a name="GST-PAD-EVENTFULLFUNC.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix06.html#api-index-1.8">1.8</a></p>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-GETRANGEFUNC:CAPS"></a><h3>GST_PAD_GETRANGEFUNC()</h3>
<pre class="programlisting">#define GST_PAD_GETRANGEFUNC(pad) (GST_PAD_CAST(pad)-&gt;getrangefunc)
</pre>
<p>Get the <a class="link" href="GstPad.html#GstPadGetRangeFunction" title="GstPadGetRangeFunction ()"><span class="type">GstPadGetRangeFunction</span></a> from the given <em class="parameter"><code>pad</code></em>
.</p>
<div class="refsect3">
<a name="GST-PAD-GETRANGEFUNC.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-QUERYFUNC:CAPS"></a><h3>GST_PAD_QUERYFUNC()</h3>
<pre class="programlisting">#define GST_PAD_QUERYFUNC(pad)		(GST_PAD_CAST(pad)-&gt;queryfunc)
</pre>
<p>Get the <a class="link" href="GstPad.html#GstPadQueryFunction" title="GstPadQueryFunction ()"><span class="type">GstPadQueryFunction</span></a> from <em class="parameter"><code>pad</code></em>
, which is the function
that handles queries on the pad. You can  use this to set your
own query handling function on a pad after you create it. If your
element derives from a base class, use the base class's virtual
functions instead.</p>
<div class="refsect3">
<a name="GST-PAD-QUERYFUNC.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-ITERINTLINKFUNC:CAPS"></a><h3>GST_PAD_ITERINTLINKFUNC()</h3>
<pre class="programlisting">#define GST_PAD_ITERINTLINKFUNC(pad)    (GST_PAD_CAST(pad)-&gt;iterintlinkfunc)
</pre>
<p>Get the <a class="link" href="GstPad.html#GstPadIterIntLinkFunction" title="GstPadIterIntLinkFunction ()"><span class="type">GstPadIterIntLinkFunction</span></a> from the given <em class="parameter"><code>pad</code></em>
.</p>
<div class="refsect3">
<a name="GST-PAD-ITERINTLINKFUNC.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-PEER:CAPS"></a><h3>GST_PAD_PEER()</h3>
<pre class="programlisting">#define GST_PAD_PEER(pad)		(GST_PAD_CAST(pad)-&gt;peer)
</pre>
<p>Return the pad's peer member. This member is a pointer to the linked <em class="parameter"><code>pad</code></em>
.
No locking is performed in this function, use <a class="link" href="GstPad.html#gst-pad-get-peer" title="gst_pad_get_peer ()"><code class="function">gst_pad_get_peer()</code></a> instead.</p>
<div class="refsect3">
<a name="GST-PAD-PEER.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-LINKFUNC:CAPS"></a><h3>GST_PAD_LINKFUNC()</h3>
<pre class="programlisting">#define GST_PAD_LINKFUNC(pad)		(GST_PAD_CAST(pad)-&gt;linkfunc)
</pre>
<p>Get the <a class="link" href="GstPad.html#GstPadLinkFunction" title="GstPadLinkFunction ()"><span class="type">GstPadLinkFunction</span></a> for the given <em class="parameter"><code>pad</code></em>
.</p>
<div class="refsect3">
<a name="GST-PAD-LINKFUNC.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-UNLINKFUNC:CAPS"></a><h3>GST_PAD_UNLINKFUNC()</h3>
<pre class="programlisting">#define GST_PAD_UNLINKFUNC(pad)		(GST_PAD_CAST(pad)-&gt;unlinkfunc)
</pre>
<p>Get the <a class="link" href="GstPad.html#GstPadUnlinkFunction" title="GstPadUnlinkFunction ()"><span class="type">GstPadUnlinkFunction</span></a> from the given <em class="parameter"><code>pad</code></em>
.</p>
<div class="refsect3">
<a name="GST-PAD-UNLINKFUNC.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-IS-LINKED:CAPS"></a><h3>GST_PAD_IS_LINKED()</h3>
<pre class="programlisting">#define GST_PAD_IS_LINKED(pad)		(GST_PAD_PEER(pad) != NULL)
</pre>
<div class="refsect3">
<a name="GST-PAD-IS-LINKED.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="GST-PAD-IS-LINKED.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the pad is linked to another pad. Use <a class="link" href="GstPad.html#gst-pad-is-linked" title="gst_pad_is_linked ()"><code class="function">gst_pad_is_linked()</code></a>
instead.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-IS-SRC:CAPS"></a><h3>GST_PAD_IS_SRC()</h3>
<pre class="programlisting">#define GST_PAD_IS_SRC(pad)		(GST_PAD_DIRECTION(pad) == GST_PAD_SRC)
</pre>
<div class="refsect3">
<a name="GST-PAD-IS-SRC.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="GST-PAD-IS-SRC.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the pad is a source pad (i.e. produces data).</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-IS-SINK:CAPS"></a><h3>GST_PAD_IS_SINK()</h3>
<pre class="programlisting">#define GST_PAD_IS_SINK(pad)		(GST_PAD_DIRECTION(pad) == GST_PAD_SINK)
</pre>
<div class="refsect3">
<a name="GST-PAD-IS-SINK.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="GST-PAD-IS-SINK.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the pad is a sink pad (i.e. consumes data).</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-IS-ACTIVE:CAPS"></a><h3>GST_PAD_IS_ACTIVE()</h3>
<pre class="programlisting">#define GST_PAD_IS_ACTIVE(pad)          (GST_PAD_MODE(pad) != GST_PAD_MODE_NONE)
</pre>
<div class="refsect3">
<a name="GST-PAD-IS-ACTIVE.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="GST-PAD-IS-ACTIVE.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the pad has been activated.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-IS-BLOCKED:CAPS"></a><h3>GST_PAD_IS_BLOCKED()</h3>
<pre class="programlisting">#define GST_PAD_IS_BLOCKED(pad)		(GST_OBJECT_FLAG_IS_SET (pad, GST_PAD_FLAG_BLOCKED))
</pre>
<p>Check if the dataflow on a <em class="parameter"><code>pad</code></em>
 is blocked. Use <a class="link" href="GstPad.html#gst-pad-is-blocked" title="gst_pad_is_blocked ()"><code class="function">gst_pad_is_blocked()</code></a> instead.</p>
<div class="refsect3">
<a name="GST-PAD-IS-BLOCKED.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-IS-BLOCKING:CAPS"></a><h3>GST_PAD_IS_BLOCKING()</h3>
<pre class="programlisting">#define GST_PAD_IS_BLOCKING(pad) (GST_OBJECT_FLAG_IS_SET (pad, GST_PAD_FLAG_BLOCKING))
</pre>
<p>Check if the <em class="parameter"><code>pad</code></em>
 is currently blocking on a buffer or event. Use
<a class="link" href="GstPad.html#gst-pad-is-blocking" title="gst_pad_is_blocking ()"><code class="function">gst_pad_is_blocking()</code></a> instead.</p>
<div class="refsect3">
<a name="GST-PAD-IS-BLOCKING.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-IS-FLUSHING:CAPS"></a><h3>GST_PAD_IS_FLUSHING()</h3>
<pre class="programlisting">#define GST_PAD_IS_FLUSHING(pad) (GST_OBJECT_FLAG_IS_SET (pad, GST_PAD_FLAG_FLUSHING))
</pre>
<p>Check if the given <em class="parameter"><code>pad</code></em>
 is flushing.</p>
<div class="refsect3">
<a name="GST-PAD-IS-FLUSHING.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-SET-FLUSHING:CAPS"></a><h3>GST_PAD_SET_FLUSHING()</h3>
<pre class="programlisting">#define GST_PAD_SET_FLUSHING(pad) (GST_OBJECT_FLAG_SET (pad, GST_PAD_FLAG_FLUSHING))
</pre>
<p>Set the given <em class="parameter"><code>pad</code></em>
 to flushing state, which means it will not accept any
more events, queries or buffers, and return GST_FLOW_FLUSHING if any buffers
are pushed on it. This usually happens when the pad is shut down or when
a flushing seek happens. This is used inside GStreamer when flush start/stop
events pass through pads, or when an element state is changed and pads are
activated or deactivated.</p>
<div class="refsect3">
<a name="GST-PAD-SET-FLUSHING.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-UNSET-FLUSHING:CAPS"></a><h3>GST_PAD_UNSET_FLUSHING()</h3>
<pre class="programlisting">#define GST_PAD_UNSET_FLUSHING(pad) (GST_OBJECT_FLAG_UNSET (pad, GST_PAD_FLAG_FLUSHING))
</pre>
<p>Unset the flushing flag.</p>
<div class="refsect3">
<a name="GST-PAD-UNSET-FLUSHING.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-IS-EOS:CAPS"></a><h3>GST_PAD_IS_EOS()</h3>
<pre class="programlisting">#define GST_PAD_IS_EOS(pad)	        (GST_OBJECT_FLAG_IS_SET (pad, GST_PAD_FLAG_EOS))
</pre>
<p>Check if the <em class="parameter"><code>pad</code></em>
 is in EOS state.</p>
<div class="refsect3">
<a name="GST-PAD-IS-EOS.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-NEEDS-RECONFIGURE:CAPS"></a><h3>GST_PAD_NEEDS_RECONFIGURE()</h3>
<pre class="programlisting">#define GST_PAD_NEEDS_RECONFIGURE(pad)  (GST_OBJECT_FLAG_IS_SET (pad, GST_PAD_FLAG_NEED_RECONFIGURE))
</pre>
<p>Check if the <em class="parameter"><code>pad</code></em>
 should be reconfigured/renegotiated.
The flag has to be unset manually after reconfiguration happened.
Use <a class="link" href="GstPad.html#gst-pad-needs-reconfigure" title="gst_pad_needs_reconfigure ()"><code class="function">gst_pad_needs_reconfigure()</code></a> or <a class="link" href="GstPad.html#gst-pad-check-reconfigure" title="gst_pad_check_reconfigure ()"><code class="function">gst_pad_check_reconfigure()</code></a> instead.</p>
<div class="refsect3">
<a name="GST-PAD-NEEDS-RECONFIGURE.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-HAS-PENDING-EVENTS:CAPS"></a><h3>GST_PAD_HAS_PENDING_EVENTS()</h3>
<pre class="programlisting">#define GST_PAD_HAS_PENDING_EVENTS(pad) (GST_OBJECT_FLAG_IS_SET (pad, GST_PAD_FLAG_PENDING_EVENTS))
</pre>
<p>Check if the given <em class="parameter"><code>pad</code></em>
 has pending events. This is used internally by
GStreamer.</p>
<div class="refsect3">
<a name="GST-PAD-HAS-PENDING-EVENTS.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-IS-FIXED-CAPS"></a><h3>GST_PAD_IS_FIXED_CAPS()</h3>
<pre class="programlisting">#define GST_PAD_IS_FIXED_CAPS(pad) (GST_OBJECT_FLAG_IS_SET (pad, GST_PAD_FLAG_FIXED_CAPS))
</pre>
<p>Check if the given <em class="parameter"><code>pad</code></em>
 is using fixed caps, which means that
once the caps are set on the <em class="parameter"><code>pad</code></em>
, the caps query function will
only return those caps. See <a class="link" href="GstPad.html#gst-pad-use-fixed-caps" title="gst_pad_use_fixed_caps ()"><code class="function">gst_pad_use_fixed_caps()</code></a>.</p>
<div class="refsect3">
<a name="GST-PAD-IS-FIXED-CAPS.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-NEEDS-PARENT:CAPS"></a><h3>GST_PAD_NEEDS_PARENT()</h3>
<pre class="programlisting">#define GST_PAD_NEEDS_PARENT(pad)       (GST_OBJECT_FLAG_IS_SET (pad, GST_PAD_FLAG_NEED_PARENT))
</pre>
<p>Check if there is a parent object before calling into the <em class="parameter"><code>pad</code></em>
 callbacks.
This is used internally by GStreamer.</p>
<div class="refsect3">
<a name="GST-PAD-NEEDS-PARENT.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-IS-PROXY-CAPS"></a><h3>GST_PAD_IS_PROXY_CAPS()</h3>
<pre class="programlisting">#define GST_PAD_IS_PROXY_CAPS(pad)      (GST_OBJECT_FLAG_IS_SET (pad, GST_PAD_FLAG_PROXY_CAPS))
</pre>
<p>Check if the given <em class="parameter"><code>pad</code></em>
 is set to proxy caps. This means that the default
event and query handler will forward all events and queries to the
internally linked <em class="parameter"><code>pads</code></em>
 instead of discarding them.</p>
<div class="refsect3">
<a name="GST-PAD-IS-PROXY-CAPS.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-SET-PROXY-CAPS"></a><h3>GST_PAD_SET_PROXY_CAPS()</h3>
<pre class="programlisting">#define GST_PAD_SET_PROXY_CAPS(pad)     (GST_OBJECT_FLAG_SET (pad, GST_PAD_FLAG_PROXY_CAPS))
</pre>
<p>Set <em class="parameter"><code>pad</code></em>
 to proxy caps, so that all caps-related events and queries are
proxied down- or upstream to the other side of the element automatically.
Set this if the element always outputs data in the exact same format as it
receives as input. This is just for convenience to avoid implementing some
standard event and query handling code in an element.</p>
<div class="refsect3">
<a name="GST-PAD-SET-PROXY-CAPS.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-UNSET-PROXY-CAPS"></a><h3>GST_PAD_UNSET_PROXY_CAPS()</h3>
<pre class="programlisting">#define GST_PAD_UNSET_PROXY_CAPS(pad)   (GST_OBJECT_FLAG_UNSET (pad, GST_PAD_FLAG_PROXY_CAPS))
</pre>
<p>Unset proxy caps flag.</p>
<div class="refsect3">
<a name="GST-PAD-UNSET-PROXY-CAPS.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-IS-PROXY-ALLOCATION:CAPS"></a><h3>GST_PAD_IS_PROXY_ALLOCATION()</h3>
<pre class="programlisting">#define GST_PAD_IS_PROXY_ALLOCATION(pad)    (GST_OBJECT_FLAG_IS_SET (pad, GST_PAD_FLAG_PROXY_ALLOCATION))
</pre>
<p>Check if the given <em class="parameter"><code>pad</code></em>
 is set as proxy allocation which means
that the default query handler will forward allocation queries to the
internally linked <em class="parameter"><code>pads</code></em>
 instead of discarding them.</p>
<div class="refsect3">
<a name="GST-PAD-IS-PROXY-ALLOCATION.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-SET-PROXY-ALLOCATION:CAPS"></a><h3>GST_PAD_SET_PROXY_ALLOCATION()</h3>
<pre class="programlisting">#define GST_PAD_SET_PROXY_ALLOCATION(pad)   (GST_OBJECT_FLAG_SET (pad, GST_PAD_FLAG_PROXY_ALLOCATION))
</pre>
<p>Set <em class="parameter"><code>pad</code></em>
 to proxy allocation queries, which means that the default query
handler will forward allocation queries to the internally linked <em class="parameter"><code>pads</code></em>

instead of discarding them.
Set this if the element always outputs data in the exact same format as it
receives as input. This is just for convenience to avoid implementing some
standard query handling code in an element.</p>
<div class="refsect3">
<a name="GST-PAD-SET-PROXY-ALLOCATION.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-UNSET-PROXY-ALLOCATION:CAPS"></a><h3>GST_PAD_UNSET_PROXY_ALLOCATION()</h3>
<pre class="programlisting">#define GST_PAD_UNSET_PROXY_ALLOCATION(pad) (GST_OBJECT_FLAG_UNSET (pad, GST_PAD_FLAG_PROXY_ALLOCATION))
</pre>
<p>Unset proxy allocation flag.</p>
<div class="refsect3">
<a name="GST-PAD-UNSET-PROXY-ALLOCATION.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-SET-PROXY-SCHEDULING:CAPS"></a><h3>GST_PAD_SET_PROXY_SCHEDULING()</h3>
<pre class="programlisting">#define GST_PAD_SET_PROXY_SCHEDULING(pad)   (GST_OBJECT_FLAG_SET (pad, GST_PAD_FLAG_PROXY_SCHEDULING))
</pre>
<p>Set <em class="parameter"><code>pad</code></em>
 to proxy scheduling queries, which means that the default query
handler will forward scheduling queries to the internally linked <em class="parameter"><code>pads</code></em>

instead of discarding them. You will usually want to handle scheduling
queries explicitly if your element supports multiple scheduling modes.</p>
<div class="refsect3">
<a name="GST-PAD-SET-PROXY-SCHEDULING.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-UNSET-PROXY-SCHEDULING:CAPS"></a><h3>GST_PAD_UNSET_PROXY_SCHEDULING()</h3>
<pre class="programlisting">#define GST_PAD_UNSET_PROXY_SCHEDULING(pad) (GST_OBJECT_FLAG_UNSET (pad, GST_PAD_FLAG_PROXY_SCHEDULING))
</pre>
<p>Unset proxy scheduling flag.</p>
<div class="refsect3">
<a name="GST-PAD-UNSET-PROXY-SCHEDULING.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-IS-PROXY-SCHEDULING:CAPS"></a><h3>GST_PAD_IS_PROXY_SCHEDULING()</h3>
<pre class="programlisting">#define GST_PAD_IS_PROXY_SCHEDULING(pad)    (GST_OBJECT_FLAG_IS_SET (pad, GST_PAD_FLAG_PROXY_SCHEDULING))
</pre>
<p>Check if the given <em class="parameter"><code>pad</code></em>
 is set to proxy scheduling queries, which means that
the default query handler will forward scheduling queries to the internally
linked <em class="parameter"><code>pads</code></em>
 instead of discarding them.</p>
<div class="refsect3">
<a name="GST-PAD-IS-PROXY-SCHEDULING.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-IS-ACCEPT-INTERSECT:CAPS"></a><h3>GST_PAD_IS_ACCEPT_INTERSECT()</h3>
<pre class="programlisting">#define GST_PAD_IS_ACCEPT_INTERSECT(pad)    (GST_OBJECT_FLAG_IS_SET (pad, GST_PAD_FLAG_ACCEPT_INTERSECT))
</pre>
<p>Check if the pad's accept intersect flag is set. The default accept-caps
handler will check if the caps intersect the query-caps result instead of
checking for a subset. This is interesting for parser elements that can
accept incompletely specified caps.</p>
<div class="refsect3">
<a name="GST-PAD-IS-ACCEPT-INTERSECT.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-SET-ACCEPT-INTERSECT:CAPS"></a><h3>GST_PAD_SET_ACCEPT_INTERSECT()</h3>
<pre class="programlisting">#define GST_PAD_SET_ACCEPT_INTERSECT(pad)   (GST_OBJECT_FLAG_SET (pad, GST_PAD_FLAG_ACCEPT_INTERSECT))
</pre>
<p>Set <em class="parameter"><code>pad</code></em>
 to by default accept caps by intersecting the result instead of
checking for a subset. This is interesting for parser elements that can
accept incompletely specified caps.</p>
<div class="refsect3">
<a name="GST-PAD-SET-ACCEPT-INTERSECT.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-UNSET-ACCEPT-INTERSECT:CAPS"></a><h3>GST_PAD_UNSET_ACCEPT_INTERSECT()</h3>
<pre class="programlisting">#define GST_PAD_UNSET_ACCEPT_INTERSECT(pad) (GST_OBJECT_FLAG_UNSET (pad, GST_PAD_FLAG_ACCEPT_INTERSECT))
</pre>
<p>Unset accept intersect flag.</p>
<div class="refsect3">
<a name="GST-PAD-UNSET-ACCEPT-INTERSECT.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-IS-ACCEPT-TEMPLATE:CAPS"></a><h3>GST_PAD_IS_ACCEPT_TEMPLATE()</h3>
<pre class="programlisting">#define GST_PAD_IS_ACCEPT_TEMPLATE(pad)    (GST_OBJECT_FLAG_IS_SET (pad, GST_PAD_FLAG_ACCEPT_TEMPLATE))
</pre>
<p>Check if the pad's accept caps operation will use the pad template caps.
The default accept-caps will do a query caps to get the caps, which might
be querying downstream causing unnecessary overhead. It is recommended to
implement a proper accept-caps query handler or to use this flag to prevent
recursive accept-caps handling.</p>
<div class="refsect3">
<a name="GST-PAD-IS-ACCEPT-TEMPLATE.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix07.html#api-index-1.6">1.6</a></p>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-SET-ACCEPT-TEMPLATE:CAPS"></a><h3>GST_PAD_SET_ACCEPT_TEMPLATE()</h3>
<pre class="programlisting">#define GST_PAD_SET_ACCEPT_TEMPLATE(pad)   (GST_OBJECT_FLAG_SET (pad, GST_PAD_FLAG_ACCEPT_TEMPLATE))
</pre>
<p>Set <em class="parameter"><code>pad</code></em>
 to by default use the pad template caps to compare with
the accept caps instead of using a caps query result.</p>
<div class="refsect3">
<a name="GST-PAD-SET-ACCEPT-TEMPLATE.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix07.html#api-index-1.6">1.6</a></p>
</div>
<hr>
<div class="refsect2">
<a name="GST-PAD-UNSET-ACCEPT-TEMPLATE:CAPS"></a><h3>GST_PAD_UNSET_ACCEPT_TEMPLATE()</h3>
<pre class="programlisting">#define GST_PAD_UNSET_ACCEPT_TEMPLATE(pad) (GST_OBJECT_FLAG_UNSET (pad, GST_PAD_FLAG_ACCEPT_TEMPLATE))
</pre>
<p>Unset accept template flag.</p>
<div class="refsect3">
<a name="GST-PAD-UNSET-ACCEPT-TEMPLATE.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix07.html#api-index-1.6">1.6</a></p>
</div>
</div>
<div class="refsect1">
<a name="GstPad.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GstPad-struct"></a><h3>struct GstPad</h3>
<pre class="programlisting">struct GstPad {
  gpointer                       element_private;

  GstPadTemplate                *padtemplate;

  GstPadDirection                direction;
};
</pre>
<p>The <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a> structure. Use the functions to update the variables.</p>
<div class="refsect3">
<a name="GstPad.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="struct_members_name">
<col class="struct_members_description">
<col width="200px" class="struct_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="struct_member_name"><p><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> <em class="structfield"><code><a name="GstPad-struct.element-private"></a>element_private</code></em>;</p></td>
<td class="struct_member_description"><p>private data owned by the parent element</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><a class="link" href="GstPadTemplate.html" title="GstPadTemplate"><span class="type">GstPadTemplate</span></a> *<em class="structfield"><code><a name="GstPad-struct.padtemplate"></a>padtemplate</code></em>;</p></td>
<td class="struct_member_description"><p>padtemplate for this pad</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><a class="link" href="GstPad.html#GstPadDirection" title="enum GstPadDirection"><span class="type">GstPadDirection</span></a> <em class="structfield"><code><a name="GstPad-struct.direction"></a>direction</code></em>;</p></td>
<td class="struct_member_description"><p>the direction of the pad, cannot change after creating
the pad.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GstPadDirection"></a><h3>enum GstPadDirection</h3>
<p>The direction of a pad.</p>
<div class="refsect3">
<a name="GstPadDirection.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-UNKNOWN:CAPS"></a>GST_PAD_UNKNOWN</p></td>
<td class="enum_member_description">
<p>direction is unknown.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-SRC:CAPS"></a>GST_PAD_SRC</p></td>
<td class="enum_member_description">
<p>the pad is a source pad.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-SINK:CAPS"></a>GST_PAD_SINK</p></td>
<td class="enum_member_description">
<p>the pad is a sink pad.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GstPadFlags"></a><h3>enum GstPadFlags</h3>
<p>Pad state flags</p>
<div class="refsect3">
<a name="GstPadFlags.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-FLAG-BLOCKED:CAPS"></a>GST_PAD_FLAG_BLOCKED</p></td>
<td class="enum_member_description">
<p>is dataflow on a pad blocked</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-FLAG-FLUSHING:CAPS"></a>GST_PAD_FLAG_FLUSHING</p></td>
<td class="enum_member_description">
<p>is pad flushing</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-FLAG-EOS:CAPS"></a>GST_PAD_FLAG_EOS</p></td>
<td class="enum_member_description">
<p>is pad in EOS state</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-FLAG-BLOCKING:CAPS"></a>GST_PAD_FLAG_BLOCKING</p></td>
<td class="enum_member_description">
<p>is pad currently blocking on a buffer or event</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-FLAG-NEED-PARENT:CAPS"></a>GST_PAD_FLAG_NEED_PARENT</p></td>
<td class="enum_member_description">
<p>ensure that there is a parent object before calling
                      into the pad callbacks.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-FLAG-NEED-RECONFIGURE:CAPS"></a>GST_PAD_FLAG_NEED_RECONFIGURE</p></td>
<td class="enum_member_description">
<p>the pad should be reconfigured/renegotiated.
                           The flag has to be unset manually after
                           reconfiguration happened.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-FLAG-PENDING-EVENTS:CAPS"></a>GST_PAD_FLAG_PENDING_EVENTS</p></td>
<td class="enum_member_description">
<p>the pad has pending events</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-FLAG-FIXED-CAPS"></a>GST_PAD_FLAG_FIXED_CAPS</p></td>
<td class="enum_member_description">
<p>the pad is using fixed caps. This means that
    once the caps are set on the pad, the default caps query function
    will only return those caps.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-FLAG-PROXY-CAPS"></a>GST_PAD_FLAG_PROXY_CAPS</p></td>
<td class="enum_member_description">
<p>the default event and query handler will forward
                     all events and queries to the internally linked pads
                     instead of discarding them.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-FLAG-PROXY-ALLOCATION:CAPS"></a>GST_PAD_FLAG_PROXY_ALLOCATION</p></td>
<td class="enum_member_description">
<p>the default query handler will forward
                     allocation queries to the internally linked pads
                     instead of discarding them.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-FLAG-PROXY-SCHEDULING:CAPS"></a>GST_PAD_FLAG_PROXY_SCHEDULING</p></td>
<td class="enum_member_description">
<p>the default query handler will forward
                     scheduling queries to the internally linked pads
                     instead of discarding them.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-FLAG-ACCEPT-INTERSECT:CAPS"></a>GST_PAD_FLAG_ACCEPT_INTERSECT</p></td>
<td class="enum_member_description">
<p>the default accept-caps handler will check
                     it the caps intersect the query-caps result instead
                     of checking for a subset. This is interesting for
                     parsers that can accept incompletely specified caps.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-FLAG-ACCEPT-TEMPLATE:CAPS"></a>GST_PAD_FLAG_ACCEPT_TEMPLATE</p></td>
<td class="enum_member_description">
<p>the default accept-caps handler will use
                     the template pad caps instead of query caps to
                     compare with the accept caps. Use this in combination
                     with <a class="link" href="GstPad.html#GST-PAD-FLAG-ACCEPT-INTERSECT:CAPS"><code class="literal">GST_PAD_FLAG_ACCEPT_INTERSECT</code></a>. (Since: 1.6)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-FLAG-LAST:CAPS"></a>GST_PAD_FLAG_LAST</p></td>
<td class="enum_member_description">
<p>offset to define more flags</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GstPadLinkReturn"></a><h3>enum GstPadLinkReturn</h3>
<p>Result values from gst_pad_link and friends.</p>
<div class="refsect3">
<a name="GstPadLinkReturn.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-LINK-OK:CAPS"></a>GST_PAD_LINK_OK</p></td>
<td class="enum_member_description">
<p>link succeeded</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-LINK-WRONG-HIERARCHY:CAPS"></a>GST_PAD_LINK_WRONG_HIERARCHY</p></td>
<td class="enum_member_description">
<p>pads have no common grandparent</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-LINK-WAS-LINKED:CAPS"></a>GST_PAD_LINK_WAS_LINKED</p></td>
<td class="enum_member_description">
<p>pad was already linked</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-LINK-WRONG-DIRECTION:CAPS"></a>GST_PAD_LINK_WRONG_DIRECTION</p></td>
<td class="enum_member_description">
<p>pads have wrong direction</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-LINK-NOFORMAT:CAPS"></a>GST_PAD_LINK_NOFORMAT</p></td>
<td class="enum_member_description">
<p>pads do not have common format</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-LINK-NOSCHED:CAPS"></a>GST_PAD_LINK_NOSCHED</p></td>
<td class="enum_member_description">
<p>pads cannot cooperate in scheduling</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-LINK-REFUSED:CAPS"></a>GST_PAD_LINK_REFUSED</p></td>
<td class="enum_member_description">
<p>refused for some reason</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GstPadLinkCheck"></a><h3>enum GstPadLinkCheck</h3>
<p>The amount of checking to be done when linking pads. <em class="parameter"><code>GST_PAD_LINK_CHECK_CAPS</code></em>

and <em class="parameter"><code>GST_PAD_LINK_CHECK_TEMPLATE_CAPS</code></em>
 are mutually exclusive. If both are
specified, expensive but safe <em class="parameter"><code>GST_PAD_LINK_CHECK_CAPS</code></em>
 are performed.</p>
<div class="blockquote"><blockquote class="blockquote"><p>Only disable some of the checks if you are 100% certain you know the link
will not fail because of hierarchy/caps compatibility failures. If uncertain,
use the default checks (<a class="link" href="GstPad.html#GST-PAD-LINK-CHECK-DEFAULT:CAPS"><code class="literal">GST_PAD_LINK_CHECK_DEFAULT</code></a>) or the regular methods
for linking the pads.</p></blockquote></div>
<div class="refsect3">
<a name="GstPadLinkCheck.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-LINK-CHECK-NOTHING:CAPS"></a>GST_PAD_LINK_CHECK_NOTHING</p></td>
<td class="enum_member_description">
<p>Don't check hierarchy or caps compatibility.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-LINK-CHECK-HIERARCHY:CAPS"></a>GST_PAD_LINK_CHECK_HIERARCHY</p></td>
<td class="enum_member_description">
<p>Check the pads have same parents/grandparents.
  Could be omitted if it is already known that the two elements that own the
  pads are in the same bin.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-LINK-CHECK-TEMPLATE-CAPS"></a>GST_PAD_LINK_CHECK_TEMPLATE_CAPS</p></td>
<td class="enum_member_description">
<p>Check if the pads are compatible by using
  their template caps. This is much faster than <em class="parameter"><code>GST_PAD_LINK_CHECK_CAPS</code></em>
, but
  would be unsafe e.g. if one pad has <a class="link" href="GstCaps.html#GST-CAPS-ANY:CAPS" title="GST_CAPS_ANY"><code class="literal">GST_CAPS_ANY</code></a>.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-LINK-CHECK-CAPS"></a>GST_PAD_LINK_CHECK_CAPS</p></td>
<td class="enum_member_description">
<p>Check if the pads are compatible by comparing the
  caps returned by <a class="link" href="GstPad.html#gst-pad-query-caps" title="gst_pad_query_caps ()"><code class="function">gst_pad_query_caps()</code></a>.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-LINK-CHECK-NO-RECONFIGURE:CAPS"></a>GST_PAD_LINK_CHECK_NO_RECONFIGURE</p></td>
<td class="enum_member_description">
<p>Disables pushing a reconfigure event when pads are
  linked.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-LINK-CHECK-DEFAULT:CAPS"></a>GST_PAD_LINK_CHECK_DEFAULT</p></td>
<td class="enum_member_description">
<p>The default checks done when linking
  pads (i.e. the ones used by <a class="link" href="GstPad.html#gst-pad-link" title="gst_pad_link ()"><code class="function">gst_pad_link()</code></a>).</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GstFlowReturn"></a><h3>enum GstFlowReturn</h3>
<p>The result of passing data to a pad.</p>
<p>Note that the custom return values should not be exposed outside of the
element scope.</p>
<div class="refsect3">
<a name="GstFlowReturn.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="GST-FLOW-CUSTOM-SUCCESS-2:CAPS"></a>GST_FLOW_CUSTOM_SUCCESS_2</p></td>
<td class="enum_member_description">
<p>Pre-defined custom success code.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-FLOW-CUSTOM-SUCCESS-1:CAPS"></a>GST_FLOW_CUSTOM_SUCCESS_1</p></td>
<td class="enum_member_description">
<p>Pre-defined custom success code (define your
                              custom success code to this to avoid compiler
                              warnings).</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-FLOW-CUSTOM-SUCCESS:CAPS"></a>GST_FLOW_CUSTOM_SUCCESS</p></td>
<td class="enum_member_description">
<p>Elements can use values starting from
                              this (and higher) to define custom success
                              codes.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-FLOW-OK:CAPS"></a>GST_FLOW_OK</p></td>
<td class="enum_member_description">
<p>Data passing was ok.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-FLOW-NOT-LINKED:CAPS"></a>GST_FLOW_NOT_LINKED</p></td>
<td class="enum_member_description">
<p>Pad is not linked.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-FLOW-FLUSHING:CAPS"></a>GST_FLOW_FLUSHING</p></td>
<td class="enum_member_description">
<p>Pad is flushing.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-FLOW-EOS:CAPS"></a>GST_FLOW_EOS</p></td>
<td class="enum_member_description">
<p>Pad is EOS.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-FLOW-NOT-NEGOTIATED:CAPS"></a>GST_FLOW_NOT_NEGOTIATED</p></td>
<td class="enum_member_description">
<p>Pad is not negotiated.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-FLOW-ERROR:CAPS"></a>GST_FLOW_ERROR</p></td>
<td class="enum_member_description">
<p>Some (fatal) error occurred. Element generating
                              this error should post an error message with more
                              details.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-FLOW-NOT-SUPPORTED:CAPS"></a>GST_FLOW_NOT_SUPPORTED</p></td>
<td class="enum_member_description">
<p>This operation is not supported.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-FLOW-CUSTOM-ERROR:CAPS"></a>GST_FLOW_CUSTOM_ERROR</p></td>
<td class="enum_member_description">
<p>Elements can use values starting from
                              this (and lower) to define custom error codes.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-FLOW-CUSTOM-ERROR-1:CAPS"></a>GST_FLOW_CUSTOM_ERROR_1</p></td>
<td class="enum_member_description">
<p>Pre-defined custom error code (define your
                              custom error code to this to avoid compiler
                              warnings).</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-FLOW-CUSTOM-ERROR-2:CAPS"></a>GST_FLOW_CUSTOM_ERROR_2</p></td>
<td class="enum_member_description">
<p>Pre-defined custom error code.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GstPadMode"></a><h3>enum GstPadMode</h3>
<p>The status of a GstPad. After activating a pad, which usually happens when the
parent element goes from READY to PAUSED, the GstPadMode defines if the
pad operates in push or pull mode.</p>
<div class="refsect3">
<a name="GstPadMode.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-MODE-NONE:CAPS"></a>GST_PAD_MODE_NONE</p></td>
<td class="enum_member_description">
<p>Pad will not handle dataflow</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-MODE-PUSH:CAPS"></a>GST_PAD_MODE_PUSH</p></td>
<td class="enum_member_description">
<p>Pad handles dataflow in downstream push mode</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-MODE-PULL:CAPS"></a>GST_PAD_MODE_PULL</p></td>
<td class="enum_member_description">
<p>Pad handles dataflow in upstream pull mode</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GstPadProbeReturn"></a><h3>enum GstPadProbeReturn</h3>
<p>Different return values for the <a class="link" href="GstPad.html#GstPadProbeCallback" title="GstPadProbeCallback ()"><span class="type">GstPadProbeCallback</span></a>.</p>
<div class="refsect3">
<a name="GstPadProbeReturn.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-PROBE-DROP:CAPS"></a>GST_PAD_PROBE_DROP</p></td>
<td class="enum_member_description">
<p>drop data in data probes. For push mode this means that
       the data item is not sent downstream. For pull mode, it means that
       the data item is not passed upstream. In both cases, no other probes
       are called for this item and <a class="link" href="GstPad.html#GST-FLOW-OK:CAPS"><code class="literal">GST_FLOW_OK</code></a> or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> is returned to the
       caller.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-PROBE-OK:CAPS"></a>GST_PAD_PROBE_OK</p></td>
<td class="enum_member_description">
<p>normal probe return value. This leaves the probe in
       place, and defers decisions about dropping or passing data to other
       probes, if any. If there are no other probes, the default behaviour
       for the probe type applies ('block' for blocking probes,
       and 'pass' for non-blocking probes).</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-PROBE-REMOVE:CAPS"></a>GST_PAD_PROBE_REMOVE</p></td>
<td class="enum_member_description">
<p>remove this probe.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-PROBE-PASS:CAPS"></a>GST_PAD_PROBE_PASS</p></td>
<td class="enum_member_description">
<p>pass the data item in the block probe and block on the
       next item.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-PROBE-HANDLED:CAPS"></a>GST_PAD_PROBE_HANDLED</p></td>
<td class="enum_member_description">
<p>Data has been handled in the probe and will not be
       forwarded further. For events and buffers this is the same behaviour as
       <a class="link" href="GstPad.html#GST-PAD-PROBE-DROP:CAPS"><code class="literal">GST_PAD_PROBE_DROP</code></a> (except that in this case you need to unref the buffer
       or event yourself). For queries it will also return <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> to the caller.
       The probe can also modify the <a class="link" href="GstPad.html#GstFlowReturn" title="enum GstFlowReturn"><span class="type">GstFlowReturn</span></a> value by using the
       <a class="link" href="GstPad.html#GST-PAD-PROBE-INFO-FLOW-RETURN:CAPS" title="GST_PAD_PROBE_INFO_FLOW_RETURN()"><code class="function">GST_PAD_PROBE_INFO_FLOW_RETURN()</code></a> accessor.
       Note that the resulting query must contain valid entries.
       Since: 1.6</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GstPadProbeType"></a><h3>enum GstPadProbeType</h3>
<p>The different probing types that can occur. When either one of
<em class="parameter"><code>GST_PAD_PROBE_TYPE_IDLE</code></em>
 or <em class="parameter"><code>GST_PAD_PROBE_TYPE_BLOCK</code></em>
 is used, the probe will be a
blocking probe.</p>
<div class="refsect3">
<a name="GstPadProbeType.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-PROBE-TYPE-INVALID:CAPS"></a>GST_PAD_PROBE_TYPE_INVALID</p></td>
<td class="enum_member_description">
<p>invalid probe type</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-PROBE-TYPE-IDLE:CAPS"></a>GST_PAD_PROBE_TYPE_IDLE</p></td>
<td class="enum_member_description">
<p>probe idle pads and block while the callback is called</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-PROBE-TYPE-BLOCK:CAPS"></a>GST_PAD_PROBE_TYPE_BLOCK</p></td>
<td class="enum_member_description">
<p>probe and block pads</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-PROBE-TYPE-BUFFER:CAPS"></a>GST_PAD_PROBE_TYPE_BUFFER</p></td>
<td class="enum_member_description">
<p>probe buffers</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-PROBE-TYPE-BUFFER-LIST:CAPS"></a>GST_PAD_PROBE_TYPE_BUFFER_LIST</p></td>
<td class="enum_member_description">
<p>probe buffer lists</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-PROBE-TYPE-EVENT-DOWNSTREAM:CAPS"></a>GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM</p></td>
<td class="enum_member_description">
<p>probe downstream events</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-PROBE-TYPE-EVENT-UPSTREAM:CAPS"></a>GST_PAD_PROBE_TYPE_EVENT_UPSTREAM</p></td>
<td class="enum_member_description">
<p>probe upstream events</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-PROBE-TYPE-EVENT-FLUSH:CAPS"></a>GST_PAD_PROBE_TYPE_EVENT_FLUSH</p></td>
<td class="enum_member_description">
<p>probe flush events. This probe has to be
    explicitly enabled and is not included in the
    @<em class="parameter"><code>GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM</code></em>
 or
    @<em class="parameter"><code>GST_PAD_PROBE_TYPE_EVENT_UPSTREAM</code></em>
 probe types.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-PROBE-TYPE-QUERY-DOWNSTREAM:CAPS"></a>GST_PAD_PROBE_TYPE_QUERY_DOWNSTREAM</p></td>
<td class="enum_member_description">
<p>probe downstream queries</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-PROBE-TYPE-QUERY-UPSTREAM:CAPS"></a>GST_PAD_PROBE_TYPE_QUERY_UPSTREAM</p></td>
<td class="enum_member_description">
<p>probe upstream queries</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-PROBE-TYPE-PUSH:CAPS"></a>GST_PAD_PROBE_TYPE_PUSH</p></td>
<td class="enum_member_description">
<p>probe push</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-PROBE-TYPE-PULL:CAPS"></a>GST_PAD_PROBE_TYPE_PULL</p></td>
<td class="enum_member_description">
<p>probe pull</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-PROBE-TYPE-BLOCKING:CAPS"></a>GST_PAD_PROBE_TYPE_BLOCKING</p></td>
<td class="enum_member_description">
<p>probe and block at the next opportunity, at data flow or when idle</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-PROBE-TYPE-DATA-DOWNSTREAM:CAPS"></a>GST_PAD_PROBE_TYPE_DATA_DOWNSTREAM</p></td>
<td class="enum_member_description">
<p>probe downstream data (buffers, buffer lists, and events)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-PROBE-TYPE-DATA-UPSTREAM:CAPS"></a>GST_PAD_PROBE_TYPE_DATA_UPSTREAM</p></td>
<td class="enum_member_description">
<p>probe upstream data (events)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-PROBE-TYPE-DATA-BOTH:CAPS"></a>GST_PAD_PROBE_TYPE_DATA_BOTH</p></td>
<td class="enum_member_description">
<p>probe upstream and downstream data (buffers, buffer lists, and events)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-PROBE-TYPE-BLOCK-DOWNSTREAM:CAPS"></a>GST_PAD_PROBE_TYPE_BLOCK_DOWNSTREAM</p></td>
<td class="enum_member_description">
<p>probe and block downstream data (buffers, buffer lists, and events)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-PROBE-TYPE-BLOCK-UPSTREAM:CAPS"></a>GST_PAD_PROBE_TYPE_BLOCK_UPSTREAM</p></td>
<td class="enum_member_description">
<p>probe and block upstream data (events)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-PROBE-TYPE-EVENT-BOTH:CAPS"></a>GST_PAD_PROBE_TYPE_EVENT_BOTH</p></td>
<td class="enum_member_description">
<p>probe upstream and downstream events</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-PROBE-TYPE-QUERY-BOTH:CAPS"></a>GST_PAD_PROBE_TYPE_QUERY_BOTH</p></td>
<td class="enum_member_description">
<p>probe upstream and downstream queries</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-PROBE-TYPE-ALL-BOTH:CAPS"></a>GST_PAD_PROBE_TYPE_ALL_BOTH</p></td>
<td class="enum_member_description">
<p>probe upstream events and queries and downstream buffers, buffer lists, events and queries</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PAD-PROBE-TYPE-SCHEDULING:CAPS"></a>GST_PAD_PROBE_TYPE_SCHEDULING</p></td>
<td class="enum_member_description">
<p>probe push and pull</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GstPadProbeInfo"></a><h3>struct GstPadProbeInfo</h3>
<pre class="programlisting">struct GstPadProbeInfo {
  GstPadProbeType type;
  gulong id;
  gpointer data;
  guint64 offset;
  guint size;
};
</pre>
<p>Info passed in the <a class="link" href="GstPad.html#GstPadProbeCallback" title="GstPadProbeCallback ()"><span class="type">GstPadProbeCallback</span></a>.</p>
<div class="refsect3">
<a name="GstPadProbeInfo.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="struct_members_name">
<col class="struct_members_description">
<col width="200px" class="struct_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="struct_member_name"><p><a class="link" href="GstPad.html#GstPadProbeType" title="enum GstPadProbeType"><span class="type">GstPadProbeType</span></a> <em class="structfield"><code><a name="GstPadProbeInfo.type"></a>type</code></em>;</p></td>
<td class="struct_member_description"><p>the current probe type</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gulong"><span class="type">gulong</span></a> <em class="structfield"><code><a name="GstPadProbeInfo.id"></a>id</code></em>;</p></td>
<td class="struct_member_description"><p>the id of the probe</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> <em class="structfield"><code><a name="GstPadProbeInfo.data"></a>data</code></em>;</p></td>
<td class="struct_member_description"><p>type specific data, check the <em class="parameter"><code>type</code></em>
field to know the
datatype.  This field can be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="struct_member_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="struct_member_name"><p><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a> <em class="structfield"><code><a name="GstPadProbeInfo.offset"></a>offset</code></em>;</p></td>
<td class="struct_member_description"><p>offset of pull probe, this field is valid when <em class="parameter"><code>type</code></em>
contains
<a class="link" href="GstPad.html#GST-PAD-PROBE-TYPE-PULL:CAPS"><span class="type">GST_PAD_PROBE_TYPE_PULL</span></a></p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> <em class="structfield"><code><a name="GstPadProbeInfo.size"></a>size</code></em>;</p></td>
<td class="struct_member_description"><p>size of pull probe, this field is valid when <em class="parameter"><code>type</code></em>
contains
<a class="link" href="GstPad.html#GST-PAD-PROBE-TYPE-PULL:CAPS"><span class="type">GST_PAD_PROBE_TYPE_PULL</span></a></p></td>
<td class="struct_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
<div class="refsect1">
<a name="GstPad.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="GstPad--caps"></a><h3>The <code class="literal">“caps”</code> property</h3>
<pre class="programlisting">  “caps”                     <a class="link" href="GstCaps.html" title="GstCaps"><span class="type">GstCaps</span></a> *</pre>
<p>The capabilities of the pad.</p>
<p>Flags: Read</p>
</div>
<hr>
<div class="refsect2">
<a name="GstPad--direction"></a><h3>The <code class="literal">“direction”</code> property</h3>
<pre class="programlisting">  “direction”                <a class="link" href="GstPad.html#GstPadDirection" title="enum GstPadDirection"><span class="type">GstPadDirection</span></a></pre>
<p>The direction of the pad.</p>
<p>Flags: Read / Write / Construct Only</p>
<p>Default value: GST_PAD_UNKNOWN</p>
</div>
<hr>
<div class="refsect2">
<a name="GstPad--offset"></a><h3>The <code class="literal">“offset”</code> property</h3>
<pre class="programlisting">  “offset”                   <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint64"><span class="type">gint64</span></a></pre>
<p>The offset that will be applied to the running time of the pad.</p>
<p>Flags: Read / Write</p>
<p>Allowed values: &gt;= 0</p>
<p>Default value: 0</p>
<p class="since">Since: <a class="link" href="ix07.html#api-index-1.6">1.6</a></p>
</div>
<hr>
<div class="refsect2">
<a name="GstPad--template"></a><h3>The <code class="literal">“template”</code> property</h3>
<pre class="programlisting">  “template”                 <a class="link" href="GstPadTemplate.html" title="GstPadTemplate"><span class="type">GstPadTemplate</span></a> *</pre>
<p>The GstPadTemplate of this pad.</p>
<p>Flags: Read / Write</p>
</div>
</div>
<div class="refsect1">
<a name="GstPad.signal-details"></a><h2>Signal Details</h2>
<div class="refsect2">
<a name="GstPad-linked"></a><h3>The <code class="literal">“linked”</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
user_function (<a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>  *pad,
               <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>  *peer,
               <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data)</pre>
<p>Signals that a pad has been linked to the peer pad.</p>
<div class="refsect3">
<a name="GstPad-linked.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the pad that emitted the signal</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>peer</p></td>
<td class="parameter_description"><p>the peer pad that has been connected</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user data set when the signal handler was connected.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p>Flags: <a href="/usr/share/gtk-doc/html/gobject/gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS">Run Last</a></p>
</div>
<hr>
<div class="refsect2">
<a name="GstPad-unlinked"></a><h3>The <code class="literal">“unlinked”</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
user_function (<a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>  *pad,
               <a class="link" href="GstPad.html" title="GstPad"><span class="type">GstPad</span></a>  *peer,
               <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data)</pre>
<p>Signals that a pad has been unlinked from the peer pad.</p>
<div class="refsect3">
<a name="GstPad-unlinked.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>pad</p></td>
<td class="parameter_description"><p>the pad that emitted the signal</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>peer</p></td>
<td class="parameter_description"><p>the peer pad that has been disconnected</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user data set when the signal handler was connected.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p>Flags: <a href="/usr/share/gtk-doc/html/gobject/gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS">Run Last</a></p>
</div>
</div>
<div class="refsect1">
<a name="GstPad.see-also"></a><h2>See Also</h2>
<p><a class="link" href="GstPadTemplate.html" title="GstPadTemplate"><span class="type">GstPadTemplate</span></a>, <a class="link" href="GstElement.html" title="GstElement"><span class="type">GstElement</span></a>, <a class="link" href="GstEvent.html" title="GstEvent"><span class="type">GstEvent</span></a>, <a class="link" href="GstQuery.html" title="GstQuery"><span class="type">GstQuery</span></a>, <a class="link" href="GstBuffer.html" title="GstBuffer"><span class="type">GstBuffer</span></a></p>
</div>
</div>
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